$3sin^2\left(4t\right)=1$

$\frac{dy}{dx}=\sqrt{x-3}$

$sec\left(x\right)\left(1-sin^2\left(x\right)\right)$

$\frac{a^3-27b^3}{3a-9b}$

$\left(5a+4\right)\left(5a-2\right)$

$135+\left(5\left(7-4\right)^2\right)$

$\left(x+1\right)\left(x+2\right)\left(x+3\right)+\left(x+2\right)\left(x+3\right)\left(x+4\right)\left(x+5\right)$