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

$3w^2-5w+3=5$

$\frac{1+\sin^2\left(85\right)-\cos^2\left(85\right)}{1+\sin^2\left(85\right)+\cos^2\left(85\right)}=\tan\left(85\right)$

$\left(\frac{1}{y^5}\right)\left(\frac{y^7}{1}\right)$

$\left(-5\right)\left\{\left(-17\right)-\left(-19\right)\right\}+12+\left(-1\right)$

$\frac{sinx+sec^2x}{sec^2x}=\cos^2x\sin x+1$

$\left(2+\frac{2i}{n}\right)^4$