Objective: I will be able to add and subtract rational functions
A. What is the sum of \frac{x}{x+4} + \frac{5}{x+4}
B. \frac{2x+1}{x^{2}+3x}+\frac{3x-8}{x(x+3)}
\frac{x+3}{x^{2}-1}+\frac{2}{x^{2}-3x+2}
\frac{x+1}{x^{2}-6x-16}-\frac{x+1}{x^{2}+6x+8}