$6y^2-22y-8$
$7^{3.99999}$
$0.14\cdot6$
$\lim_{h\to0}\left(\frac{\sqrt{4w-3}-\sqrt{4w-3}}{h}\right)$
$14=a-9$
$12+\left(-12\right)+\left[90\right]^2$
$21x-12x+6-7x$
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