$\frac{a^4-a^2-1}{a^2+1}$
$\frac{d^2}{dx^2}\left(\frac{sin\left(y\right)}{x^2}\right)$
$\left[-15\right]\cdot\frac{1}{\left[-15\right]}$
$2\left(1.740\right)$
$-6x^2y^6+30x^4\:y^5z^2-45x^3y^3z$
$\left(-h+\frac{1}{2}\right)^2$
$\frac{5}{10}x+\frac{3}{4}x$
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