$\frac{\int\cos\left(x\right)-\sin\left(x\right)}{\cos\left(x\right)}dx$

$\frac{dx}{dy}\left(a\ln\left(xy\right)=ax^2+by\right)$

$\log_x\left(\frac{1}{3}\right)=8$

$\frac{\left(\left(4x\right)+10\right)}{2}=-3x$

$\frac{d}{dx}\:x^3-x^2-2x$

$\frac{12}{x}+x-8=0$

$9\left(a\:+\:1\right)\left(a\:+\:2\right)\:-\:9$