$16a^2-72a+81$
$\sqrt{225}+\sqrt{196}-\sqrt{169}$
$\frac{-9x-3}{-3}$
$-2\left(x-6\right)$
$3x-4\le8$
$\frac{32^{2x+6}\cdot2^{x+9}}{64^{x+5}}=162,534$
$\left(sin\:x\right)y'+\left(2\:cos\:x\right)\:=\:\left(cos\:x\right)^4$
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