$4x+3^2$
$-12,43+8,30$
$\left(6x^7+x+5\right)-\left(2x^2-2x-1\right)$
$49c^2+14c+1$
$\left(a-12m^2x^2\right)^2$
$\left(x-6\right)^2=x^2+12x+36$
$10=3u+1$
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