$-2mn-2m^2-8mn-22n^2$
$ln\left(x-4\right)=-6$
$-4\left(-7r-1\right)+5r$
$x^2+12x=-11$
$\left(2+2i\right)+\:\left(2+5i\right)$
$\int_{-1}^{+\infty}\left(72+\frac{x}{1+x^2}\right)dx$
$\int\left(x^2+2x+3\right)e^xdx$
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