$\frac{1}{\sin^6}$
$15xy+25z-8x+4xy-12-18x+32$
$71^2-53^2$
$216+12$
$\frac{10}{13}+\frac{3}{13}$
$\frac{x^5}{x^2-4}$
$\int_{\frac{\pi}{6}}^{\frac{\pi}{4}}\frac{csc2x}{3}dx$
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