∫(3x+4)/(x^2+1)^2dx求不定积分

∫1/(x^2-4x+3)dx,求不定积分, 求不定积分∫(x^2-3x)/(x+1)dx 求不定积分 ∫（3x^2-2x+2)dx ∫(2x-1)^2 dx 求不定积分 ∫ 1/(1+2x)² dx ∫ x/√x²+4 dx 求不定积分 1/(1+cosx)dx ((xcosx+sinx)/(xsinx)^2)dx (x^2+1/(x^3+3x+1)^5 )dx 4arctanx-x/(1+x^2)dx 求不定积分∫( x/2 - 1/x + 3/x^3 + 4/x^4)dx, 求积分∫(2x^4+x^3+x-1)/(x^3-1)dx ∫(5x^2-x+1)/(x^3-4x^2)dx求微积分 求∫ x^4-3x^2+5x-1 / x^3dx的不定积分? 求不定积分：∫(e^3x+e^x)dx/(e^4x-e^2x +1) 求 ∫ [(x^3)/(x^2-1)^(1/2)]dx, ∫（4x+3)/(x-2)^3dx求不定积分 ∫(x^2-3x+1/2)dx求不定积分 求不定积分∫1/x^2+2x+3dx 求积分(3/2)∫dx/(x^2-x+1) 求积分∫x(x^2-3)^(1/2)dx ∫(x^2+1)/(x^4+1)dx求积分? 求∫(x^3-1)/(x^2+1)dx