Simplify.

Question

Complex Fractions.
b-2b/b+3/1/b+3+1/b-3=
LCM: (b+3)(b-3)

Answer 1

Try typing in your expression at wolframalpha.com

and keep adding parentheses until it interprets your text correctly!

I suspect you mean

b - 2b/(b+3)
-----------------
1/(b+3) + 1/(b-3)

If not, maybe you can clear things up a bit. Online text formatting requires a bit more effort.