$5\sin\left(x\right)=3\tan\left(y\right)$

$16x-x$

$\sqrt[4]{\frac{-36}{25}}$

$sec\left(20\right)-tan20$

$\left(1-x\right)\left(1+2x\right)\left(1-2x-\frac{x^2}{\left(1+2x\right)}\right)$

$\frac{m^2}{s^2}\cdot\frac{m}{s^2}$

$\int_0^{\infty}\left(\frac{e^{-x}}{e^{-2x}+9}\right)dx$