Question 826547
That's ambiguous.  Here is a try at interpreting:

{{{1/x-3/(x+1)=4}}}
'
Attempting to solve,
{{{x(x+1)-3=4x(x+1)}}}
{{{x^2+x-3=4x^2+4x}}}
{{{x-3=2x^2+4x}}}
{{{-3=2x^2+3x}}}
{{{2x^2+3x-3=0}}}
'
Discriminant is {{{9-(4*2)(-3)=9+24=33}}}
{{{x=(-9+- sqrt(33))/(2*2)}}}
{{{x=(-9+- sqrt(33))/4}}}


Another try:
{{{(1/(x-3))/(x+1)=4}}}
Is this the one you have?