Решить интеграл! интеграл (x^3)dx/(x^2-1)

∫dx/(x^3+x^2+2*x+2)=INT(1/(3*(x+1))-x/(3*(x^2+2))-1/(3*(x^2+2)))*dx=(Ln(x+1))/3-(Ln(x^2+2))/6-(arctg(x/(2^0,5))/(18^0,5))+C; Либо так 
Либо так int=1/2int(dx/(x+1)-1/2int(x+1)/(X^2)1=1/2int(dx/(x+1)-1/2int(xdx/(x^2+1)-
1/2int(dx/(x^2+1)