### Simplify rational expressions, solve rational equations, solve word problems

See attached file for full problem description. Add/subtract and simplify: 1. 5 -4 ___ + ________ c2d3 7cd2 36. 3x + 2 x - 2 _______ + ______ 3x + 6 x2 - 4 50. 3(x - 2) 5(2x + 1) 3(x + 1) _______ +