1/(cosx(5+3cosx) ) 的不定积分

int(1/(cos(x)*(5+3*cos(x))),x) = int((-1-u^2)/(3*u^2+u^4-4),u) and int((-1-u^2)/(3*u^2+u^4-4),u) = int(-(3/5)/(u^2+4)+1/(5*u+5)-1/(-5+5*u),u) and int(-(3/5)/(u^2+4)+1/(5*u+5)-1/(-5+5*u),u) = int(-(3/5...