Given a string representing an expression of fraction addition and subtraction, you need to return the calculation result in string format. The final result should be irreducible fraction. If your final result is an integer, say 2, you need to change…

public class Solution { private int GCD(int a, int b) { ? GCD(b, a % b) : a; } private int LCM(int a, int b) { return a * b / GCD(a, b); } public string FractionAddition(string expression) { ]; var FU = true;//默认当前表达式为负 if (first != '-') { FU = false…