${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}3x(6x^2-1{)}^{3}dx=$

$40/1$ point

${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}{x}^2(2-3x^3{)}^{\frac{3}{2}}dx=$

$50/1$ point

${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{x+1}{(x^2+2x-3{)}^2}dx=$

$60/1$ point

${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{4x}{\sqrt[\phantom{2}]{1+x^2}}dx=$

$($no answer$)$

$70/1$ point

${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}5x\sqrt[3]{1-x^2}dx=$

$($no ansu