Question

calcule integral (x^2+1)^2

Answer 1

$∫ { ({x}^{2} + 1) }^{2}dx \\ = ∫({x}^{4} + 2 {x}^{2} + 1)dx \\ = \frac{1}{5} {x}^{5} + \frac{2}{3} {x}^{3} + x + k$