$-10\left(9+-7x\right)+-6$
$-5q+6\left(8q-4\right)$
$-5-\left(4-1\right)+1$
$\left(x^3+2x^2\right)\left(4x+3\right)$
$2+-9+-4+1$
$2a-2b\:$
$\lim_{x\to3}\left(\frac{x^2-9}{\sin\left(x-3\right)}\right)$
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