Question 1112493
Simplify {{{x^(m+n) * y^(3m-n)/ (x^(-n) * y^(3m))}}}
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Use {{{ x^a/x^b = x^(a-b) }}} 

{{{x^(m+n) * y^(3m-n)/ (x^(-n) * y^(3m))}}}
=  {{{x^((m+n)-(-n)) * y^(3m-n-3m)  }}}
=   {{{ highlight( x^(m+2n) * y^(-n))  }}}
or you can move y to the denominator and write
=   {{{ highlight( x^(m+2n) / y^n)  }}}