$2n\left(n-1\right)-3y\left(n-1\right)$
$\left(8\cdot10^{-3}\right)\left(5\cdot10^9\right)$
$-4a\:-\:2b\:+\:3b$
$2+\frac{4}{s}$
$\left(3p^4x-7q^2y\right)^2$
$-2x+4x-5+4-6x$
$\left(16^{16}\right)^{16}$
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