$\left(2x+2y\right)\left(9x^2-6xy+4y^2\right)$
$2\left(x+3\right)+6$
$12a^2b^2c-5a^2bc^2-12a^3b^2c+3a^2bc^2+4a^3b^2c$
$\left(7x+3x^2\right)^2$
$-4^{13}$
$-1+-9+-9+-2+-4y+-5y$
$\left(2b^2+3b\right)\left(b^2+3\right)\left(2-b\right)$
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