Question 536096
7/x - 6x/x^2-64 + 4/x+8

When I did the / mark that means over the next numbers following it, it is fractions
-------------
I think you mean
{{{7/x - 6x/(x^2-64) + 4/(x+8)}}}
Use parentheses for clarity:
7/x - 6x/(x^2-64) + 4/(x+8)
--------------------
Find a common den
x(x^2 - 64) works, since x+8 is a factor of x^2-64
------------
= {{{7(x^2-64)/den - 6x*x/den + 4*x*(x-8)/den}}}
= {{{(7x^2-448 - 6x^2 + 4x^2 - 32x)/den}}}
= {{{(5x^2 -32x -448)/(x^3 - 64x)}}}