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**cmf0106** Thanks & one last thing for now.

In $\displaystyle 12xyz(4x^4y^2z^5+5x^3z^2+3x^5y)$

$\displaystyle x^2$ can be factored out because in the term $\displaystyle 5x^3z^2$ $\displaystyle x^2$ is the MOST that can removed and still remain an x value. And since factoring is "divided into" we are subtracting the exponent values because $\displaystyle \frac{a^m}{a^n}=a^{m-n}$. Thus $\displaystyle x^2$ can be factored out, does that logic sound correct? Also this procedure is not done for the z and y variables because they do not show up in all the terms right?