$2\sin\left(x\right)\cos\left(3x\right)=\sin\left(x\right)$

$3x^{-2}y^{-\frac{1}{3}}=3x$

$\ln\left(y\right)-8x\ln\left(x\right)=-7$

$\int x^{\frac{4}{3}}\left(x^{\frac{5}{3}}-7x^{\frac{2}{9}}-x^{\frac{3}{5}}\right)dx$

$\int\frac{x^7}{\sqrt[3]{x^2+1}}dx$

$-4+8-\left(27+35\right)-60$

$2x^2y^2-6xy^3-8x^4y^5$