1.bmp (1.03 MB, 下载次数: 119)
样式

sum(Y(j)
sum(Z(n):a(i,j)*b(n,j))));
sum(Y(j)
sum(Z(n):a(i,j)*b(n,j)))); 



sum(y(j)
sum(z(n):a(i,j)*b(n,j))));



sum(link2(n,j):a(i,j)*b(n,j)));
写错了的话,不要怪我。
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