$-3amx-4a^3$
$\lim_{x\to2}cos\left(x\right)$
$121a^2+66ab^2c^2+9b^4c^6$
$\left(7b+7\right)\left(5b-3\right)$
$\left(1+x\sqrt{3}\right)^5$
$cscx\left(tanx-senx\right)=secx-1$
$\left(x+1\right)^2+\left(x+2\right)^2-2x\left(x+3\right)$
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