$-190-47$
$7y+3-4y-6$
$x^2+10x+x$
$\left(-432\right)+\left(1889\right)$
$\frac{q^2-1}{\frac{q^2+2q-3}{\frac{9^{-4}}{9^{+3}}}}$
$15-\left(5+10\right)$
$\lim_{x\to-2}\left(\frac{6x^2+12x}{x^2-4}\right)$
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