多目标规划lingo,代码哪错了?too many inequality or equality ralation

多目标规划lingo,代码哪错了?too many inequality or equality ralation
min z=0.3*x1*x2+0.7*(x1^2+x2^2);
2.5-x1>0;
(x1^2)*x2-1>0;
x1-x2>0;
4*x2-x1>0;

min=0.3*x1*x2+0.7*(x1^2+x2^2)