$3^3\:x\:3^3$

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

$\lim_{x\to0}\left(\frac{ln\left(\cos\:\left(y\right)\right)}{y^2}\right)$

$x\cdot\frac{dy}{dx}+1=y$

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

$\left(\sqrt{5x}\right)^3$

$m^2-6m+34$