$\int\frac{1}{\left(x-1\right)\left(3x+1\right)}dx$

$-10+5-12-17$

$x\frac{dy}{dx}+3x^2+4y=0\:;\:y\left(1\right)=\frac{1}{2}$

$\int\left(3x^2\cdot\cos\left(4x^3+9\right)\right)dx$

$q\left(x\right)=\left(3x^3+4x\right)^x$

$\left(-3mn^2x^2\right)^2$

$m^4\left(3x-8y+z\right)+3n^2\left(3x-8y+z\right)$