diff --git a/src/ytdl_sub/script/functions/__init__.py b/src/ytdl_sub/script/functions/__init__.py
index 9b48ab2a..b16fa070 100644
--- a/src/ytdl_sub/script/functions/__init__.py
+++ b/src/ytdl_sub/script/functions/__init__.py
@@ -1,5 +1,6 @@
+from ytdl_sub.script.functions.numeric_functions import NumericFunctions
 from ytdl_sub.script.functions.string_functions import StringFunctions
 
 
-class Functions(StringFunctions):
+class Functions(StringFunctions, NumericFunctions):
     pass
diff --git a/src/ytdl_sub/script/functions/numeric_functions.py b/src/ytdl_sub/script/functions/numeric_functions.py
new file mode 100644
index 00000000..ba86bde2
--- /dev/null
+++ b/src/ytdl_sub/script/functions/numeric_functions.py
@@ -0,0 +1,31 @@
+from ytdl_sub.script.types.resolvable import Float
+from ytdl_sub.script.types.resolvable import Integer
+from ytdl_sub.script.types.resolvable import Numeric
+
+
+def _to_numeric(value: int | float) -> Numeric:
+    if int(value) == value:
+        return Integer(value=value)
+    return Float(value=value)
+
+
+class NumericFunctions:
+    @staticmethod
+    def add(left: Numeric, right: Numeric) -> Numeric:
+        return _to_numeric(left.value + right.value)
+
+    @staticmethod
+    def sub(left: Numeric, right: Numeric) -> Numeric:
+        return _to_numeric(left.value - right.value)
+
+    @staticmethod
+    def mul(left: Numeric, right: Numeric) -> Numeric:
+        return _to_numeric(left.value * right.value)
+
+    @staticmethod
+    def div(left: Numeric, right: Numeric) -> Numeric:
+        return _to_numeric(left.value / right.value)
+
+    @staticmethod
+    def mod(value: Integer, modulo: Integer) -> Integer:
+        return Integer(value=value.value % modulo.value)
diff --git a/src/ytdl_sub/script/overrides_resolver.py b/src/ytdl_sub/script/overrides_resolver.py
index 34a58a9d..39955f78 100644
--- a/src/ytdl_sub/script/overrides_resolver.py
+++ b/src/ytdl_sub/script/overrides_resolver.py
@@ -3,9 +3,9 @@ from typing import List
 from typing import Optional
 from typing import Set
 
-from ytdl_sub.script.functions import Resolvable
 from ytdl_sub.script.parser import parse
 from ytdl_sub.script.syntax_tree import SyntaxTree
+from ytdl_sub.script.types.resolvable import Resolvable
 from ytdl_sub.script.types.variable import Variable
 from ytdl_sub.utils.exceptions import StringFormattingException
 
diff --git a/src/ytdl_sub/script/types/function.py b/src/ytdl_sub/script/types/function.py
index 238c4cc9..baf1b3d2 100644
--- a/src/ytdl_sub/script/types/function.py
+++ b/src/ytdl_sub/script/types/function.py
@@ -133,13 +133,13 @@ class Function(VariableDependency):
         received_type_names: List[str] = []
         for arg in self.args:
             if isinstance(arg, Function):
-                received_type_names.append(f"{arg.name}(...)->{arg.output_type.__name__}")
+                received_type_names.append(f"%{arg.name}(...)->{arg.output_type.__name__}")
             else:
                 received_type_names.append(arg.__class__.__name__)
 
         received_args_str = f"({', '.join([name for name in received_type_names])})"
 
-        return f"Expected {self.input_spec.expected_args_str()}.\nReceived ({received_args_str})"
+        return f"Expected {self.input_spec.expected_args_str()}.\nReceived {received_args_str}"
 
     @property
     def callable(self) -> Callable[..., Resolvable]:
diff --git a/src/ytdl_sub/script/types/resolvable.py b/src/ytdl_sub/script/types/resolvable.py
index 7e5aab97..815cebb1 100644
--- a/src/ytdl_sub/script/types/resolvable.py
+++ b/src/ytdl_sub/script/types/resolvable.py
@@ -30,12 +30,12 @@ class Numeric(ResolvableT[NumericT], ABC, Generic[NumericT]):
 
 
 @dataclass(frozen=True)
-class Integer(ResolvableT[int]):
+class Integer(Numeric[int]):
     pass
 
 
 @dataclass(frozen=True)
-class Float(ResolvableT[float]):
+class Float(Numeric[float]):
     pass