∫1/(x^2+x+1)^2dx=
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∫ x/(1+X^2)dx=
∫(x+1/x)^2dx=?
∫(1+x)/(X^2)dx=∫ [(1+x)/(X^2)]dx得什么?
∫[dx/(e^x(1+e^2x)]dx
∫1+2x/x(1+x)*dx∫1+2x/x(1+x) * dx
∫(x-1)^2dx,
∫x^1/2dx
∫x[x/[(2a-x)]^(1/2)dx=?
1/(x+x^2)dx
∫1/x^2+x+1dx
∫1/(x^2+x+1)dx
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∫X^2/1-x^2 dx.
∫X^2/1-x^2 dx.
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∫(x^2+1/x^4)dx
∫2 -1|x²-x|dx