$sin\left(x\right)\:=\:\frac{sec\left(x\right)}{tan\left(x\right)\:+\:cot\left(x\right)}$

$\sqrt{27x}+\sqrt{108x}+8\sqrt{3x}$

$-49x^2+392x-768$

$32sin^4\left(x\right)cos^2\left(x\right)$

$1=2v-5$

$x^{2\:}+19x+12=\left(4x+3\right)\left(x+4\right)$

$\sec x\left(1-\cos x\right)=\sec x-1$