$\left(x-1\right)\left(x+3\right)>0$

$\int\frac{4x-1}{\left(x^2+4\right)\left(x-4\right)}dx$

$-\sqrt{3}sin\theta\:-3sin\theta\:\:tan\theta\:-tan\theta\:=-tan\theta\:$

$x^2+2xy-y-x\frac{dy}{dx}$

$\int\frac{3x^2}{\sqrt{5-4x^3}}dx$

$14mnx^2+10y^2+10x^2+14mny^2$

$\frac{x}{-12}+1=-8$