$\frac{\left(1+\tan\left(x\right)\right)}{\left(1-\tan\left(x\right)\right)}=\frac{2}{3}$

$y=\left(t+8\right)^2+\left(t+2\right)$

$g\left(y\right)=\frac{\left(y-2\right)^{4}}{\left(y^{2}+2y\right)^{5}}$

$\frac { x ^ { 2 } - 16 } { x ^ { 2 } + 8 x + 16 }$

$\frac{x^4+625}{x-5}$

$\int ln\left(x+e\right)\:\:dx$

$25s\:+\:12s\:$