Task D. Calc3: Squares. Write an even better calculator program calc3.cpp that can understand squared numbers. We are going to use a simplified notation X to mean X2. For example, 10 + 7 - 51 should mean 102+7- 512 Example: When reading input file formulas.txt 5i 1000 + 6A -5 + 1; the program should report: $./calc3