$\lim_{x\to\infty}\left(\frac{-x^2+0.3\cdot x^4}{\left(1-0.3\cdot\:x^2\right)^2+x^2}\right)$
$36y-8y+15-13$
$55\cdot47$
$\lim_{x\to-2}\left(\frac{\sqrt{11-x}-3}{x+2}\right)$
$7x^2y+2x^2y+-2xy+-5xy$
$\sin^{2}x^{2}y^{2+y}$
$4y^2-81$
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