1. Simplify



First, add the fractions on top. Find common denominators:





Multiply out the second fraction on top.




Add the tops on the top.




The top simplifies to




We are now ready to invert and multiply.








which simplifies to




Note that we could go straight from




to the answer.

Cancel out the things that would cancel if you inverted and




and the only thing that is left is the B in the top.


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