$\frac{x-7}{x^3-x^2-11x+3}$

$a^2+a^2+a^2+a^2$

$\frac{dx}{dt}=x^2,\:x\left(0\right)\:=\:1$

$\frac{dc}{dq}=0.08q^2-1.6q+6.5$

$5x-11y-3y^2+4y^2-x$

$\cos\left(x\right)\left(\sin^2\left(x\right)-\cos^2\left(x\right)\right)\sec\left(x\right)+\cos^2\left(x\right)=\sin^2\left(x\right)$

$\int arctan3xdx$