$12g\:-\:32\:=\:4g$
$4\cdot\left(\left(5-8\right)-\left(1-3\right)\right)-3\cdot\left(9-11\right)$
$999^2-996^2+993^2-990^2$
$\:-9x+1=\:-80\:\:$
$-2\cdot2\cdot0$
$2^7\cdot2^{-2}$
$25g^2+40g+16$
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