🙁Depth of Parentheses 😌

Problems on bracket sequences will outlive us all. Today's variation is about finding the depth.

Given: A string containing a valid mathematical expression (digits, operators, parentheses).
Task: Return an integer representing the maximum nesting depth of parentheses.

Examples:
solve('1 + 2') 
# Result: 0

solve('(1) + ((2))') 
# Result: 2 (maximum in the second part of the expression)

solve('(3 * n + 1) / 2') 
# Result: 1


Share your one-liners (and not only) in the comments 👇🏻

#algosobes