$\frac{-x^2-2x+2}{x^2-x}$
$19-\left(-6\right)$
$g\left(x\right)=-\frac{1}{x^2}\:y\:f\left(x\right)=-x^4-4x^2$
$44=5x^2+6y^2$
$cos\:x-3=-cos\:x$
$-19-10+8+12-15-20$
$\int\:\frac{x^2+x+1}{\left(x+4\right)\left(x-2\right)\left(x+3\right)}dx$
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