$\:5\left(9w+5\right)$
$\left(-2\right)^9\:$
$\left(a^{x-1}-2b^{x-1}\right)\left(a^{x+1}-2b^{x-1}\right)$
$\lim_{x\to1}3$
$2x^2+7x-3=0$
$3x-2y+z=8$
$x^3-y^3=-10$
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