$5,5w,15w^4,10w^3$
$-20\:-\:\left(-16\right)\:-\:\left(-7\right)$
$3\left(n-6\right)$
$\left(n^{-6}\left(n^5\right)\right)^{\frac{1}{4}}$
$3x^2+x-10=0$
$\left(3xy-7z^4\right)^2$
$\left(0.7-9a\right)\left(0.6-5a\right)$
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