$-16x^2+32x+9$
$x2-2x-4=20$
$16x-7=11x-32$
$\frac{7^{10}}{7^9}$
$6.25\cdot0.5$
$\frac{dy}{dx}=\frac{y^2+4y+4}{x^2-2x+1}$
$4\:\left(-5\right)\:-3\:\left(7\right)$
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