Refactor code in directories + add doc strings

python_symb/MathTypes/symbols.py

@@ -0,0 +1,48 @@
+from __future__ import annotations
+
+
+
+class Symbols:
+    """
+    All maths things (other than number) that will be parsed need to be of "Symbols" class
+    """
+    instances = []
+
+    def __init__(self, name):
+        self.name = name
+        Symbols.instances.append(self)
+
+    def __repr__(self):
+        return self.name
+
+    def __str__(self):
+        return self.name
+
+    def __add__(self, other):
+        from python_symb.Expressions.expr import Expr
+        return Expr('+', [self, other])
+
+    def __radd__(self, other):
+        from python_symb.Expressions.expr import Expr
+        return Expr('+', [other, self])
+
+    def __mul__(self, other):
+        from python_symb.Expressions.expr import Expr
+        return Expr('*', [self, other])
+
+    def __rmul__(self, other):
+        from python_symb.Expressions.expr import Expr
+        return Expr('*', [other, self])
+
+
+class Var(Symbols):
+    """
+    variable, like 'x' in x+2
+    """
+    instances = []
+
+    def __init__(self, name):
+        super().__init__(name)
+        self.__class__.instances.append(self)
+
+