$2\left(1\right)^2.2-\frac{1}{8}\left(12\right)^2+-2$
$9^2\cdot2^2$
$2nm^4\cdot\left(2n^2\right)^3$
$x^3-4x+x^2$
$\left(x+k\right)^5$
$5\:x\:\left(-2\right)^3$
$\left(15p+14\right)^2$
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