$x\left(\frac{dy}{dx}\right)=\left(1-2x^2\right)tan\left(y\right)$

$-8-2\left(8-5n\right)$

$\frac{d^7}{d^3}$

$2x^4-2xy^2$

$3x^2y^2+9x^2y^2-18xy^2$

$\log_{0.5}\left(256\right)$

$\frac{\cos\left(\infty\right)}{1+\cos\left(\infty\right)}=\frac{\sin\left(\infty\right)}{\sin\left(\infty\right)+\tan\left(\infty\right)}$