$\frac{3\left(x+h\right)^{2}-3x^{2}}{h}$
$\left(16x\right)^2+40x+25$
$\left(x^m\:+\:x^m\right)^2$
$9x^4+4x^6$
$3x\cdot3x^3+y^2$
$\frac{dy}{dx}=6x^2-5$
$\left(y+5\right)\left(y^2-5y+25\right)$
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