Write a program that calculates the result of a given math operation. The given program reads the input math operation as a string. You should calculate and print the result.

Assume that the input will only contain numbers, summation and subtraction operators. The input will not contain spaces or any other types of characters and operators. Each input will contain exactly one equals character at the end.

Examples:
INPUT OUTPUT
32+3-5= 30
123-23-101= -1
1+11-111+99+5= 5


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