$2n+3.5=17.5$
$1-5v+7$
$25m^2x^2-9n^2y^2$
$\lim_{x\to\infty}\left(\frac{5x+sin\left(x\right)}{2x+cos\left(x\right)}\right)$
$g^{-8}.g^4.g^{-4}$
$\frac{dy}{dx}=cos\left(x+y\right)+sen\left(x\right)sen\left(y\right)$
$x^2-1^2$
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