In python please • calculate(tokens): Takes one list of tokens as input corresponding to a mathematical equation.The function will evaluate both sides of the equality and return a list of three tokens: the result ofthe left-hand side (integer), the equals sign (string), and the result of the right-hand side (integer).The equation may contain any of the operations in the OPERATIONS list, as well as opening andclosing parentheses. Your function should evaluate both sides of the equation while respecting orderof operations (that is, parentheses, followed by exponentiation, then multiplication and division,and then addition and subtraction).Equations may have multiple sets of parentheses and nested parentheses. The contents of theinner-most nested parentheses should always be evaluated first. To determine where the inner-mostparentheses are in the list of tokens, it can be helpful to find the last opening parenthesis ( in thelist, and then find the first closing parenthesis ) that occurs after that point. Then you wouldevaluate the contents of those parentheses to a single integer, and replace all the tokens betweenthose parentheses, and the two parentheses themselves, by that single integer.If the list of tokens does not correspond to a valid equation (e.g., it has two operations or numbersin a row, or an operation at the start or end of the list), then return the original tokens list withoutperforming any operations.>> calculate([4, 'x', 2, '=', 9, 'x', 2])[8, '=', 18]>> calculate([5, 'x', '(', 4, '+', 2, )', '=', 49])[30, '=', 49]>>> calculate([3, 'x', 'x', 7])[3, 'x', 'x', 7]

calculate( tokens): Takes one list of tokens as input corresponding to a mathematical equation. The…

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C++ for Engineers and Scientists

4th Edition

ISBN:9781133187844

Author:Bronson, Gary J.

Publisher:Bronson, Gary J.

Chapter7: Arrays

Section7.5: Case Studies

Problem 3E

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