y/x+1 to the denominator of x^3+1

Question

Please help convert the following fractions

Answer 1

[(x^3 + 1)/1]/y/x+1) = [(x^3 + 1)/1][(x + 1)/y] = [(x^3 + 1)(x + 1)]/y =

(x^4 + x^3 + x + 1)/y