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DIY: Basic Calculator III

Understand how to parse and evaluate complex mathematical expressions as strings, including handling operators and parentheses. Learn to implement a function that computes the integer result while respecting operator precedence and truncating division accurately.

Problem statement

You are given a string s containing only positive integers, operators ('+', '-', '*', '/'), and parentheses '()'. The intermediate results of the given expression string are in the range [-2312^{31} ...