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发帖数: 14 | 1 maple菜鸟求助！
我这里有很长的表达式，比如
temp := (1-s[i])^2*(-(2*(1-s[i]))*(-(1/4)*x[i-1, j]/ds+(1/4)*x[i+1, j]/ds-(1
/4)*y[i-1, j]/ds+(1/4)*y[i+1, j]/ds)+(1-s[i])^2*((1/2)*x[i-1, j]/ds^2-x[i, j
]/ds^2+(1/2)*x[i+1, j]/ds^2+(1/2)*y[i-1, j]/ds^2-y[i, j]/ds^2+(1/2)*y[i+1, j
]/ds^2))+(1-s[i])^3*(-(1/4)*x[i-1, j]/ds+(1/4)*x[i+1, j]/ds-(1/4)*y[i-1, j]/
ds+(1/4)*y[i+1, j]/ds)+((1/2)*x[i, j-1]/dv^2-x[i, j]/dv^2+(1/2)*x[i, j+1]/dv
^2+(1/2)*y[i, j-1]/dv^2-y[i, j]/dv^2+(1/2)*y[i, j+1]/dv^2)*(1-s[i])^2+(2*(1-
exp(x[i, j]+y |
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