$-a+a-a+a-3a+6a$
$10x+6\ge x+3$
$y^4-9x^2$
$1-3+4-3-1+2$
$\left(3b\right)^2+2\left(3b\right)\left(7\right)+\left(7\right)^2$
$5a^2+a^2+2a^2$
$\left(4c^2+2d\right)\left(4c^2d\right)$
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