$-\left(5+\left(4-1\right)\right)-\left(2-\left(8-\left(3+2\right)\right)\right)+\left(5-9\right)-\left(-3\right)$
$x^{21}\:x\:y^{-21}$
$\left(n^2+7n\:+10\right)+\left(t+6\right)$
$-22x+6+4x-3x$
$\int_{e^y}^y\frac{y\log x}{x}dx$
$x^2\left(3y^3\right)x\:2\:$
$\frac{\left(3^8\right)\left(3^{-5}\right)}{3^2}$
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