$\int x\:sec^{-1}\:x\:dx$
$w2wd$
$25p^{2}+25$
$\left(3\cdot\left(-4\right)\right)+\left(3\cdot\left(10\right)\right)$
$400-x^2y^2$
$\frac{20a^2b^2}{-10a^5b}$
$\left(5x^2+2x+1\right)+\left(6x^2-3x+9\right)$
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