Amiyah Jones , Feature/lesson 06 : Expression Caculator

[AmiyahJo]

For this assignment, you will need to implement the functions and logic required to calculate a mathematical expression. After implementing the add, divide, and multiply functions, you will combine these functions to compute the final result.

Made changes to the expression_calculator.ts file to pass all checks and VScode passed all 5 tests. I mixed up Javascript and Typescript with my terms , along with the fact that I needed to include how to calculate the exponent.