$-3298-3209$
$64t^2-32\left(a+b\right)+4\left(4+b\right)^2$
$11^4\cdot11^{-3}$
$\lim_{x\to2}\left(x^2-x+12\right)$
$84^2-74^2$
$-91-1$
$9abc,a=2,b=4,c=10$
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