$-18x+30$

$\left(\frac{14\left(x^2\right)^3\left(x^3\right)^2}{\left(x^3\right)^4}\right)$

$\left(10a+7b\right)\left(10a-7b\right)$

$\sin^2x=\left(1+\cos x\right)\left(1-\cos x\right)$

$2\:.\:\left(3-4+2\right)\:-\:\left(-15\right)\:+\:\left(13-8\right)\:.\:5$

$\left(16x^{\frac{-1}{3}}+8x^{\frac{1}{3}}-x\right)^2$

$\left(ab\right)^{m}=a^{m}b^{m}$