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

$({\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\sqrt[\phantom{2}]{x}(si{n}^{-1}\sqrt[\phantom{2}]{x})dx)({\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{(si{n}^{-1}x{)}^2}{\sqrt[\phantom{2}]{1-x^2}}dx)$

Problem $2$