∫1/(10+2x+x^2)dx=?

∫ x/(1+X^2)dx= ∫(x+1/x)^2dx=? ∫1/[x*(x^10+2)]dx∫1/[x*(x^10+2)]dx ∫(1+x)/(X^2)dx=∫ [(1+x)/(X^2)]dx得什么? ∫1/(10+2x+x^2)dx=? ∫x[x/[(2a-x)]^(1/2)dx=? ∫[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 ∫1/1-x^2dx= ∫(1+x^2)dx = ∫(2cosx +1／x)dx= ∫（lnx)/(1+x^2)dx=? ∫xcos(1+x^2)dx= ∫1/x^2dx=? ∫dx/x^2(1-x^2) ∫dx/x^2(1+x^2)