$12x^2+11x-5$
$-4+4-3$
$\left(3j+11\right)+\left(8j-7\right)$
$y=3x^{-2x}$
$\left(3w+5\right)\left(2w+7\right)$
$-11-\left(4-9\right)$
$-4.5=-0.5\left(x-7.1\right)$
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