$\lim_{x\to\infty}\left(\frac{2x^3}{x^4-1}\right)$
$\left(\sqrt{6x^7}\right)\left(\sqrt{8x^2}\right)$
$\frac{16x^2-25}{4x-5}$
$\frac{64a^3-27y^6}{4a-3y^2}$
$7,002\:+\:703$
$\frac{\sqrt{7}}{\sqrt{7}}$
$\int\frac{1-tan^2x}{sec^2x}dx$
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