Given the expression frac1a+frac1b\\frac{1}{a} + \\frac{1}{b}frac1a+frac1b, combine into a single fraction.
fraca+bab\\frac{a+b}{ab}fraca+bab
frac1a+b\\frac{1}{a+b}frac1a+b
fraca−bab\\frac{a-b}{ab}fraca−bab
frac2a+b\\frac{2}{a+b}frac2a+b