# Todolist * Improve fix recognition (DONE) * More flexible expression parsing (DONE) * bug: expression can't handle -(-2) (DONE) * Overload + - * for expression (DONE ~ no steps yet) * Add name to polynom (DONE) * Expression parents class and his children: Numerical_exp, toGenerate_exp and formal expression * Create tbl sgn and variation render * Make less verbose fractions operations(DONE)