qqp question1: Mathematical Puzzles: What is () + () + () = 30 using 1,3,5,7,9,11,13,15? question2: If F = {(1,2), (3, 5), (4,7)} and G = {(1,4), (3,0), and (5, 2)}, what is F + G? What is F\G (using function arithmetic)?