Question 309792
a^-2 b^3
divided by
1^4 b^-2 is equivalent to 
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{{{a^-2*b^3/((1^4) b^-2)}}}
1^4 has no effect
{{{a^-2*b^3/b^-2}}}
Multiply NUM and DEN by a^2
= {{{b^3/(a^2)b^-2)}}}
Multiply NUM and DEN by b^2
= {{{b^5/a^2}}}