$\left[\left(-1\right)^{20}\::\:\left(1\right)^{19}\right]^2$
$m-3\left(2m-1\right)-2\left(-3m-6\right)$
$\:3c+5c$
$\sqrt[1]{2^2}$
$\left(a^3+8\right)\left(a^3+9\right)$
$4x^2y\:+\:xy\:-\:2xy\:+2x^2y$
$0.08^3$
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