1) (-3/7 + 4/9 - 4/7 + 5/9) + (-5/8 + 3/8) = (-60/63 + 28/63 - 48/56 + 35/63) + (-30/56 + 21/56) = (-45/63 + 35/63) + (-9/56) = -10/63 - 9/56 = -320/2016 - 567/2016 = -887/2016
2) (1 + 2 + 3 + 4 + 5 + 6) + 1/3 + 1/4 + 1/6 + 2/3 + 3/4 + 5/6 = 21 + 47/12 + 17/12 + 9/6 + 8/3 + 15/4 = 21 + 47/12 + 17/12 + 3/2 + 8/3 + 15/4 = 21 + 9/12 + 4/12 + 18/12 + 32/12 + 45/12 = 91/12 + 77/12 + 42/12 = 210/12 = 17 1/2
1) (-3/7 + 4/9 - 4/7 + 5/9) + (-5/8 + 3/8) = (-60/63 + 28/63 - 48/56 + 35/63) + (-30/56 + 21/56) = (-45/63 + 35/63) + (-9/56) = -10/63 - 9/56 = -320/2016 - 567/2016 = -887/2016
2) (1 + 2 + 3 + 4 + 5 + 6) + 1/3 + 1/4 + 1/6 + 2/3 + 3/4 + 5/6 = 21 + 47/12 + 17/12 + 9/6 + 8/3 + 15/4 = 21 + 47/12 + 17/12 + 3/2 + 8/3 + 15/4 = 21 + 9/12 + 4/12 + 18/12 + 32/12 + 45/12 = 91/12 + 77/12 + 42/12 = 210/12 = 17 1/2