$\left(2x+4xh+2h^2-3\right)^2$

$12mn^4+33mn^2-9m$

$10\sin^2x=5-5\cos2x$

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

$\left(\frac{2x^{\frac{2}{3}}}{y^{\frac{1}{2}}}\right)^2\left(\frac{3x^{-\frac{5}{6}}}{y^{\frac{1}{3}}}\right)$

$\frac{5}{\sqrt{2}}g$

$x^2+14x+36$