代码：

import java.util.Map;
import java.util.HashMap;
import java.util.Scanner;
public class Main{static Map<String, Integer> left = new HashMap<>();static Map<String, Integer> right = new HashMap<>();public static void addput(Map<String, Integer> m, String s, int num){if(m.containsKey(s)) {int newnum = num+m.get(s);m.put(s, newnum);}elsem.put(s, num);}public static void formula(String str, int l, int r, int coef) {int digits = 1;int i = l, j = 0;while(str.charAt(i)>='0'&&str.charAt(i)<='9') {j = j*10+(int)(str.charAt(i)-'0');i++;}coef = Math.max(coef, coef*j);while(i<=r) {j = 0;digits=1;if(str.charAt(i)=='(') {int hel = 1;int rr = i;while(rr<=r&&hel!=0) {rr++;if(str.charAt(rr)=='(') hel++;else if(str.charAt(rr)==')') hel--;}int k = rr+1;while(k<=r&&str.charAt(k)<='9'&&str.charAt(k)>='0') {j= j*10+(int)(str.charAt(k)-'0');k++;}digits = Math.max(digits, digits*j);formula(str, i+1, rr-1, coef*digits);i = k;continue;}if(str.charAt(i)==')') {i++;continue;}String s = str.charAt(i)+"";i++;if(i<=r&&str.charAt(i)>='a'&&str.charAt(i)<='z') {s+=str.charAt(i)+"";i++;}while(i<=r&&str.charAt(i)>='0'&&str.charAt(i)<='9') {j= j*10+(int)(str.charAt(i)-'0');i++;}digits = Math.max(digits, digits*j);if(r<str.indexOf("=")) addput(left, s, coef*digits);elseaddput(right, s, coef*digits);}}public static void expr(String str, int l, int r) {int ap = str.indexOf('+',l);if(ap<0||ap>r) {formula(str, l, r, 1);return ;}formula(str, l, ap-1, 1);if(str.indexOf('+',ap+1)>ap+1&&str.indexOf('+',ap+1)<r)expr(str, ap+1, r);elseformula(str, ap+1,r, 1);}public static boolean isEquation(String str) {int l = 0, r = str.length()-1;int ep = str.indexOf('=');expr(str,l,ep-1);expr(str,ep+1,r);if(left.equals(right)) return true;else return false;}public static String YorN(String str) {if(isEquation(str)) return "Y";else return "N";}public static void main(String[] args) {Scanner in = new Scanner(System.in);int n = in.nextInt();String res = "";for(int i=0;i<n;i++) {left.clear();right.clear();String str = in.next();res+=YorN(str);/*System.out.print("left:");for(String key:left.keySet()) System.out.print(key+":"+left.get(key)+" ");System.out.println();System.out.print("right:");for(String key:right.keySet()) System.out.print(key+":"+right.get(key)+" ");*/}for(int i=0;i<n;i++) System.out.println(res.charAt(i)+"");in.close();}
}