Question 711909
Please put multiple-term numerators and denominators in parentheses. What you posted meant:
{{{f(x) = x+7/x^2+5x-3}}}
But I suspect that this is not the actual equation. Please re-post using parentheses to make the numerators and denominators clear. (If you're not sure when to use parentheses, use them all the time! Too many do not cause a problem (as long as they are balanced) while too few often says the wrong thing.)