$\frac{d}{dx}-\log_{2\left(x-a\right)}$
$\frac{a^2+5a+6}{2}$
$2w-8w$
$\left(x^3+7\right)\left(x^3-12\right)$
$-4x^2+4x+3=0$
$x=\cos\left(x+y\right)$
$79.15-29.79$
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