$\left(-2\right)^3-\left(-5\right)$
$yx'-x=2y^2$
$\lim_{x\to\infty25}\left(\frac{2x^3-2x^2+x-3}{x^3+2x^2-x+1}\right)$
$-x^2-12x^2-3x^2+15x^2$
$4\:4\:-\left(-15\right)$
$7.6\:-\:5.88\:=\:\:\:$
$e=x^{3}+\frac{1}{x^{3}}\quad\text{si}\quad\frac{1}{x}+x=4$
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