∫ [(x^3-2x^2+x+1)/(x^4+5x^2+4)]dx
∫ [(x^3-2x^2+x+1)/(x^4+5x^2+4)]dx
∫2^x*3^x/(9^x-4^x) dx
∫(3x^4+x^2)/(x^2+1)dx
∫(x^4-4x^2+5x-15)/(x^2+1)(x-2) dx=?
∫(x^2+1/x^4)dx
∫1/(x^4-x^2)dx
计算 ∫(x^4-2x^3+x^2+1)/x(x-1)² dx
∫(5x^2-x+1)/(x^3-4x^2)dx
不定积分x^7dx/(x^4+2) 不定积分(3x^4+x^3+4x^2+1)dx/(x^5+2x^3+x) 不定积分d
∫((x+2)/4x(x^2-1))dx
积分∫x/[(x^2+1)(x^2+4)]dx
不定积分f(x^2+3x+4)/(x-1)dx