diff --git a/data_structures/hashing/hash_table_with_linked_list.py b/data_structures/hashing/hash_table_with_linked_list.py
index f404c5251246..c8dffa30b8e8 100644
--- a/data_structures/hashing/hash_table_with_linked_list.py
+++ b/data_structures/hashing/hash_table_with_linked_list.py
@@ -8,7 +8,7 @@ def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
     def _set_value(self, key, data):
-        self.values[key] = deque([]) if self.values[key] is None else self.values[key]
+        self.values[key] = deque() if self.values[key] is None else self.values[key]
         self.values[key].appendleft(data)
         self._keys[key] = self.values[key]
 
diff --git a/machine_learning/linear_discriminant_analysis.py b/machine_learning/linear_discriminant_analysis.py
index 8528ccbbae51..af5248c4dbc4 100644
--- a/machine_learning/linear_discriminant_analysis.py
+++ b/machine_learning/linear_discriminant_analysis.py
@@ -252,7 +252,7 @@ def accuracy(actual_y: list, predicted_y: list) -> float:
 num = TypeVar("num")
 
 
-def valid_input(
+def valid_input[num](
     input_type: Callable[[object], num],  # Usually float or int
     input_msg: str,
     err_msg: str,
diff --git a/maths/area.py b/maths/area.py
index 31a654206977..470173826cce 100644
--- a/maths/area.py
+++ b/maths/area.py
@@ -135,6 +135,32 @@ def surface_area_cone(radius: float, height: float) -> float:
     return pi * radius * (radius + (height**2 + radius**2) ** 0.5)
 
 
+def lateral_surface_cone(radius: float, height: float) -> float:
+    """
+    Calculate the Lateral Surface Area of a Cone.
+    Wikipedia reference: https://en.wikipedia.org/wiki/Cone
+    Formula: pi * r * (h ** 2 + r ** 2) ** 0.5
+
+    >>> lateral_surface_cone(10, 20)
+    702.4814731040726
+    >>> lateral_surface_cone(6, 8)
+    188.49555921538757
+    >>> lateral_surface_cone(0, 0)
+    0.0
+    >>> lateral_surface_cone(1, -2)
+    Traceback (most recent call last):
+          ...
+    ValueError: lateral_surface_cone() only accepts non-negative values
+    >>> lateral_surface_cone(-1, 2)
+    Traceback (most recent call last):
+          ...
+    ValueError: lateral_surface_cone() only accepts non-negative values
+    """
+    if radius < 0 or height < 0:
+        raise ValueError("lateral_surface_cone() only accepts non-negative values")
+    return pi * radius * (height**2 + radius**2) ** 0.5
+
+
 def surface_area_conical_frustum(
     radius_1: float, radius_2: float, height: float
 ) -> float:
@@ -202,6 +228,32 @@ def surface_area_cylinder(radius: float, height: float) -> float:
     return 2 * pi * radius * (height + radius)
 
 
+def lateral_surface_cylinder(radius: float, height: float) -> float:
+    """
+    Calculate the Lateral Surface Area of a Cylinder.
+    Wikipedia reference: https://en.wikipedia.org/wiki/Cylinder
+    Formula: 2 * pi * r * h
+
+    >>> lateral_surface_cylinder(10, 20)
+    1256.6370614359173
+    >>> lateral_surface_cylinder(6, 8)
+    301.59289474462014
+    >>> lateral_surface_cylinder(0, 0)
+    0.0
+    >>> lateral_surface_cylinder(1, -2)
+    Traceback (most recent call last):
+      ...
+    ValueError: lateral_surface_cylinder() only accepts non-negative values
+    >>> lateral_surface_cylinder(-1, 2)
+    Traceback (most recent call last):
+      ...
+    ValueError: lateral_surface_cylinder() only accepts non-negative values
+    """
+    if radius < 0 or height < 0:
+        raise ValueError("lateral_surface_cylinder() only accepts non-negative values")
+    return 2 * pi * radius * height
+
+
 def surface_area_torus(torus_radius: float, tube_radius: float) -> float:
     """Calculate the Area of a Torus.
     Wikipedia reference: https://en.wikipedia.org/wiki/Torus
@@ -555,6 +607,50 @@ def area_reg_polygon(sides: int, length: float) -> float:
     return (sides * length**2) / (4 * tan(pi / sides))
 
 
+def surface_area_reg_prism(sides: int, edge: float, height: float) -> float:
+    """
+    Calculate the surface area of a regular prism.
+    Wikipedia reference: https://en.wikipedia.org/wiki/Prism
+    Formula: 2*S(base) + n*a*h
+
+    >>> surface_area_reg_prism(3, 10, 20)
+    686.6025403784439
+    >>> surface_area_reg_prism(4, 10, 10)
+    600.0
+    >>> surface_area_reg_prism(2, 10, 15)
+    Traceback (most recent call last):
+        ...
+    ValueError: surface_area_reg_prism() only accepts integers greater than or equal \
+to three as number of sides
+    >>> surface_area_reg_prism(5, -2, 3)
+    Traceback (most recent call last):
+        ...
+    ValueError: surface_area_reg_prism() only accepts non-negative values as \
+length of an edge or height
+    >>> surface_area_reg_prism(5, 2, -3)
+    Traceback (most recent call last):
+        ...
+    ValueError: surface_area_reg_prism() only accepts non-negative values as \
+length of an edge or height
+    >>> surface_area_reg_prism(2, -10, 15)
+    Traceback (most recent call last):
+        ...
+    ValueError: surface_area_reg_prism() only accepts integers greater than or equal \
+to three as number of sides
+    """
+    if not isinstance(sides, int) or sides < 3:
+        raise ValueError(
+            "surface_area_reg_prism() only accepts integers greater than or \
+equal to three as number of sides"
+        )
+    elif edge < 0 or height < 0:
+        raise ValueError(
+            "surface_area_reg_prism() only accepts non-negative values as \
+length of an edge or height"
+        )
+    return 2 * area_reg_polygon(sides, edge) + sides * edge * height
+
+
 if __name__ == "__main__":
     import doctest
 
@@ -576,9 +672,12 @@ def area_reg_polygon(sides: int, length: float) -> float:
     print(f"Sphere: {surface_area_sphere(20) = }")
     print(f"Hemisphere: {surface_area_hemisphere(20) = }")
     print(f"Cone: {surface_area_cone(10, 20) = }")
+    print(f"Cone, lateral: {lateral_surface_cone(10, 20) = }")
     print(f"Conical Frustum: {surface_area_conical_frustum(10, 20, 30) = }")
     print(f"Cylinder: {surface_area_cylinder(10, 20) = }")
+    print(f"Cylinder, lateral: {lateral_surface_cylinder(10, 20) = }")
     print(f"Torus: {surface_area_torus(20, 10) = }")
     print(f"Equilateral Triangle: {area_reg_polygon(3, 10) = }")
     print(f"Square: {area_reg_polygon(4, 10) = }")
     print(f"Reqular Pentagon: {area_reg_polygon(5, 10) = }")
+    print(f"Regular Pentagonal Prism: {surface_area_reg_prism(5, 10, 15) = }")
diff --git a/searches/jump_search.py b/searches/jump_search.py
index e72d85e8a868..b443d09283b0 100644
--- a/searches/jump_search.py
+++ b/searches/jump_search.py
@@ -20,7 +20,7 @@ def __lt__(self, other: Any, /) -> bool: ...
 T = TypeVar("T", bound=Comparable)
 
 
-def jump_search(arr: Sequence[T], item: T) -> int:
+def jump_search[T: Comparable](arr: Sequence[T], item: T) -> int:
     """
     Python implementation of the jump search algorithm.
     Return the index if the `item` is found, otherwise return -1.