[求助]解符号方程组。急啊！

[yanyan300300]

不知道为什么，我一运行matlab解符号方程组就报错。下面的代码是从一本教程上copy的，都无法执行，请问有没有人知道问题出在哪儿？等着要结果，急得都不行了。谢谢各位！
clear;
clc;
e1=sym('a+b+x=y');
e2=sym('2*a*x-b*y=-1');
e3=sym('(a+b)^2=x+y');
e4=sym('a*y+b*x=4');
[a,b,x,y]=solve(e1,e2,e3,e4);

下面是报错内容：
??? Attempt to execute SCRIPT solve as a function:
D:\目录一\新建文件夹\LT\MATLAB\solve.m

Error in ==> sym.solve at 49
[varargout{1:max(1,nargout)}] = solve(S{:});

[slgu]

我执行时未有障碍，结果为：
a =
1
-127333/44820+99/1660*(-1/27*(8516188+134460*401^(1/2))^(1/3)-40264/27/(8516188+134460*401^(1/2))^(1/3)-229/27)^2-35/2241*(8516188+134460*401^(1/2))^(1/3)-1409240/2241/(8516188+134460*401^(1/2))^(1/3)
-127333/44820+99/1660*(1/54*(8516188+134460*401^(1/2))^(1/3)+20132/27/(8516188+134460*401^(1/2))^(1/3)-229/27+1/2*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3)))^2+35/4482*(8516188+134460*401^(1/2))^(1/3)+704620/2241/(8516188+134460*401^(1/2))^(1/3)+35/166*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3))
-127333/44820+99/1660*(1/54*(8516188+134460*401^(1/2))^(1/3)+20132/27/(8516188+134460*401^(1/2))^(1/3)-229/27-1/2*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3)))^2+35/4482*(8516188+134460*401^(1/2))^(1/3)+704620/2241/(8516188+134460*401^(1/2))^(1/3)-35/166*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3))
b =
1
-1/27*(8516188+134460*401^(1/2))^(1/3)-40264/27/(8516188+134460*401^(1/2))^(1/3)-229/27
1/54*(8516188+134460*401^(1/2))^(1/3)+20132/27/(8516188+134460*401^(1/2))^(1/3)-229/27+1/2*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3))
1/54*(8516188+134460*401^(1/2))^(1/3)+20132/27/(8516188+134460*401^(1/2))^(1/3)-229/27-1/2*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3))
x =
1
181553/14940-117/1660*(-1/27*(8516188+134460*401^(1/2))^(1/3)-40264/27/(8516188+134460*401^(1/2))^(1/3)-229/27)^2+49/747*(8516188+134460*401^(1/2))^(1/3)+1972936/747/(8516188+134460*401^(1/2))^(1/3)
181553/14940-117/1660*(1/54*(8516188+134460*401^(1/2))^(1/3)+20132/27/(8516188+134460*401^(1/2))^(1/3)-229/27+1/2*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3)))^2-49/1494*(8516188+134460*401^(1/2))^(1/3)-986468/747/(8516188+134460*401^(1/2))^(1/3)-147/166*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3))
181553/14940-117/1660*(1/54*(8516188+134460*401^(1/2))^(1/3)+20132/27/(8516188+134460*401^(1/2))^(1/3)-229/27-1/2*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3)))^2-49/1494*(8516188+134460*401^(1/2))^(1/3)-986468/747/(8516188+134460*401^(1/2))^(1/3)+147/166*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3))
y =
3
18593/22410-9/830*(-1/27*(8516188+134460*401^(1/2))^(1/3)-40264/27/(8516188+134460*401^(1/2))^(1/3)-229/27)^2+29/2241*(8516188+134460*401^(1/2))^(1/3)+1167656/2241/(8516188+134460*401^(1/2))^(1/3)
18593/22410-9/830*(1/54*(8516188+134460*401^(1/2))^(1/3)+20132/27/(8516188+134460*401^(1/2))^(1/3)-229/27+1/2*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3)))^2-29/4482*(8516188+134460*401^(1/2))^(1/3)-583828/2241/(8516188+134460*401^(1/2))^(1/3)-29/166*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3))
18593/22410-9/830*(1/54*(8516188+134460*401^(1/2))^(1/3)+20132/27/(8516188+134460*401^(1/2))^(1/3)-229/27-1/2*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3)))^2-29/4482*(8516188+134460*401^(1/2))^(1/3)-583828/2241/(8516188+134460*401^(1/2))^(1/3)+29/166*i*3^(1/2)*(-1/27*(8516188+134460*401^(1/2))^(1/3)+40264/27/(8516188+134460*401^(1/2))^(1/3))
>

[hitzhjtopku]

ME TOO

[guru]

没问题~~