`int (x^3-1)/((x^4+1)(x+1)) dx` is

int((x^(3)-1))/((x^(4)+1)(x+1))dx= a) 1/4ln(1+x^(4))+1/3ln(1+x^(3))+c b) 1/4ln(1+x^(4))-1/3ln(1+x^(3))+c c) 1/4ln(1+x^(4))-ln(1+x)+c d) 1/4ln(1+x^(4))+ln(1+x)+c

int(x^(3))/(x^(4)+1)dx

int(x^3dx)/((1+x^(4))

int(x+3)/((x+1)^4)dx

int((x^(3)-1)dx)/(x^(4)

int(x+3)/((x+1)^4)\ dx

int(x+3)/((x+1)^(4))dx

int(x+3)/((x+1)^(4))dx

int((x-1)/(x+1))^(4)dx