$\frac{3}{5}+\frac{x+2}{2x}-\frac{x^2+2}{6x}$

$-z-18=20$

$\int_0^{\frac{\pi}{4}}\left(\pi tan^3\left(x\right)\right)\left(-\pi sec^3\left(x\right)\right)dx$

$16x^22-24x+9$

$\frac{sec\left(x\right)\:+\:csc\left(x\right)}{tan\left(x\right)\:+1}$

$\left(2x+6y\right)^{2}$

$sin\left(x\right)=-\frac{\sqrt{17}}{17}$