$-6.2-8.4$

$11q+5p-9q+7p$

$\frac{\left(-14\right).\left(-3\right)}{\left(-7\right)}\:+\:\frac{\left(+16\right).\left(-2\right)}{\left(+8\right)}$

$\left(-1-x\right)\left(-1+x\right)$

$\frac{dy}{dx}\left(ln\left(y\right)+y=x^2\right)$

$x-1<x^2+3x$

$\lim_{x\to-\infty}\left(\frac{2x^4}{3x^3-4}\right)$