$3\:x\:\left(-4\right)+\left(52+-4\:x\:2\right)-\left(-9.82\right)$
$\frac{72x^5-36x^3+6x^2}{6x^2}$
$\lim_{x\to\infty}\left(\sqrt{7x^2-3x+4}-\sqrt{7x^2-4}\right)$
$3x+5y-8=0$
$t=4s+3.77$
$\left(15+8\right)\cdot\left(20\right)$
$5x^2+3x+xy=3$
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