Simple Calculator Program test cases

Suppose you are writing a simple calculator program. This program can handle positive integer calculation, including addition, subtraction, multiplication, and division. The input is a string composed of digits (0, 1, 2, …, 9) and operators (+, -, *, /). No space is allowed. The input string can be at most 100 characters long, and each number can compose of at most 10 digits. Division of two integers produces one integer by truncation. If the answer contains more than 10 digits, this program simply outputs an overflow error message. Using the equivalence partitioning and boundary value analysis methods, derive a set of test cases for the program?