$\int\sin\left(3x\right).\tan\left(3x\right)dx$

$\left(4x-4^2\right)$

$\frac{3^{5m}}{3^{3m}}$

$\frac{1}{2}\:\left(x+y+z\right)$

$-6\left(7x-3\right)$

$40\cdot69$

$\lim_{x\to0}\left(\frac{\left(sin\left(\frac{1}{x}\right)sin^2\left(\frac{x}{2}\right)\right)}{x}\right)$