Question 373651
{{{(7x^(-1)y^3)}}}{{{""*""}}}{{{(-10xy^(-5))}}}
<pre>
Notice that the x on the right has the understood exponent 1:

{{{(7x^(-1)y^3)}}}{{{""*""}}}{{{(-10x^1y^(-5))}}}

1. We multiply the coefficient {{{7}}} by the 
coefficient {{{-10}}} and get {{{-70}}}.  

2. We add the exponent of the x on the left, {{{-1}}}, and the 
   exponent of x on the right {{{""+1}}},

3. We add the exponent of the y on the left, {{{3}}}, and the 
   exponent of y on the right {{{-5}}},

{{{-70x^(-1+1)y^(3-5)}}}


4. We complete the addition of the exponents:

{{{-70x^0y^(-2)}}}

5.  We replace the {{{x^0}}} by {{{(1)}}}

{{{-70(1)y^(-2)}}}

6. {{{-70}}} time {{{1}}} is just {{{-70}}}

{{{-70y^(-2)}}}

7. To make a negative exponent positive you move the factor from
   the numerator to the denominator and change the sign
   of the exponent to positive:

8. {{{""-""}}}{{{70/y^2}}}

That's it.

Edwin</pre>