2.应用换元积分法求下列不定积分:1) ∫e^(5x)dx(3 ∫(dx)/(4-3x)dx(5 ∫(dx)/(cos^27x)(7 ∫cos^3xsinxdxx2dx(⑨∫(x^2dx)/(√(x^3+1)-√2+1(1 ∫(sinx)/(cos^3x)dxdx.cos xdx(3 ∫(dx)/(√(tanx-1)cos^2x)tan x-1cos2xtan x+1(1) ∫(√(tanx+1))/(cos...