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

$\frac{\sec\left(x\right)-\cos\left(x\right)}{\sin^2x\sec^2x}$

$\lim_{x\to0}\left(t\cos\left(2t\right)\right)$

$\frac{32x^2-54+12x}{8x-9}$

$\left(5x^2+7y\right)^3$

$\left(x-\sin\left(x\right)\right)^2$

$3^4-4^2$