Помогите решить пример по действиям 98целых 61/83-(1+3/8)-(88целых 5/33-87целых 5/6)-( 4целых 11/13

98 61/83 - (1 + 3/8) - (88 5/33 - 87 5/6) - (4 11/13 + 2 41/52) - 87 8/13 = 98 61/83 - 1 3/8 - (38/33 - 5/6) - (6 + (11/13 + 41/52)) - 87 8/13 = 98 61/83 - 1 3/8 - (38*2/66 - 5*11/66) - (6 + 85/52) - 87 8/13 = 98 61/83  - 21/66 - 7 33/52 - 87 8/13 = 98 61/83 - 7/22 - 7 33/52 - 87 8/13 = (98 - 7 -87 ) + (61/83 - 7/22 - 33/52 - 8/13) = 4 + (61 * 52 *11 - 7*83*26 - 33*83*11 - 8*83*4*11) / 83*52*11 = 4 + (34892 - 15106 - 30129 - 29216) /  47476 = 4 + (-49559)/47476 = 4 - 1 2083/47476 = 2 45393/47476