(m^4)(m^-2)/m^-4
H HallsofIvy Elite Member Joined Jan 27, 2012 Messages 7,763 Jan 5, 2013 #2 \(\displaystyle \frac{a^ma^n}{a^p}= \frac{a^{m+n}}{a^p}= a^{m+n}a^{-p}= a^{m+n-p}\)
