$\int\:\frac{-x-1}{x^3-x^2}dx$
$x^2>16$
$5+3\left\{4-2\left(3^2+2\right)^3+2\right\}+3$
$20.36+20.36+6.4+20+20+20+18+5+16.23+21.57+27.72+8.69+2+5+18+22+53$
$tanx-tanxcsc^2x=cotx$
$u^2+24u$
$y^2-21y-72$
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