$\lim_{x\to0}\frac{x^4-x^2}{x^2}$
$\left(d+g\right)^5$
$5x^2\cos+y^2=1$
$\lim_{x\to\infty}\left(\sqrt{9x^2+8x+1}-\sqrt{9x^2-4x+3}\right)$
$4-4\left(7-4\right)+8-7\left(5-5\right)$
$\int\frac{2x^2-3x-2}{x+2}dx$
$t^3\sqrt{t^4}+1$
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