18/57- 2/57+41/57= 95/99+40/99-34/99= 7/16+15/16= 3/7-1/7= 41/66+58/66+50/66= 70/72-65/72+55/72= 10/12+7/12-1/12= 55/78+38/78= 16/93-11/93= 3/6+4/6+1/6=

(18 - 2 + 41) / 57 = 57/57 = 1.

(95 + 40 - 34) / 99 = 101/99 = 1 2/99.

(7 + 15) / 16 = 22/16 = 1 6/16 = 1 3/8.

(3 - 1) / 7 = 3/7.

(41 + 58 + 50) / 66 = 149/66 = 2 17/66.

(70 - 65 + 55) / 72 = 60/72 = 5/6.

(10 + 7 - 1) / 12 = 16/12 = 1 4/12 = 1 1/3.

(55 + 38) / 78 = 93/78 = 1 15/78 = 1 5/26.

(16 - 11) / 93 = 5/93.

(3 + 4 + 1) / 6 = 8/6 = 1 2/6 = 1 1/3.

(21 * 31 - 12 * 12) / (31 * 31) = (651 - 144) / 961 = 507/961.

(4 + 4 - 3) / 5 = 5/5 = 1.

(61 + 53) / 79 = 114/79 = 1 35/79.

(61 - 38) / 83 = 23/83.

(12 + 48 + 97) / 99 = 157/99 = 1 58/99.

(31 - 23 + 51) / 84 = 59/84.

32/89 + 2/83 = (32 * 83 + 2 * 89) / (89 * 83) = (2656 + 178) / 7387 = 2834/7387.

(2 + 4) / 9 = 6/9 = 2/3.

(7 - 2) /11 = 5/11.

(14 + 31 + 14) / 39 = 59/39 = 1 20/39.

(38 - 3 + 42) / 55 = 77/55 = 7/5 = 1 2/5.

(13 + 7 - 18) / 30 = 2/30 = 1/15.

(7 + 65) / 87 = 72/87 = 24/29.

(64 + 4 + 42) / 84 = 110/84 = 55/42 = 1 13/42.

(63 - 54 + 6) / 87 = 15/87 = 5/29.

25/29 : 4/29 = 25/29 * 29/4 = 25/4 = 6 .

18/29 : 4/29 = 18/29 * 29/4 = 18/4 = 4 2/4 = 4 .

(26 + 34) / 53 = 60/53 = 1 7/53.

(37 - 14) / 63 = 23/63.

(22 + 29 + 20) / 30 = 71/30 = 2 11/30.

(29 - 19 + 55) / 75 = 65/75 = 13/15.

1/3.

(11 + 29) / 58 = 40/58 = 20/29.

(73 - 40) / 90 = 33/90 = 11/30.

(88 + 27 + 45) / 98 = 160/98 = 1 62/98 = 1 31/49.

(33 - 4 + 34) / 62 = 63/62 = 1 1/62.

(74 + 62 - 18) / 90 = 118/90 = 1 28/90 = 1 14/45.

(3 + 7) / 36 = 10/36 = 5/18.

(25 - 14) / 89 = 11/89.

(2 + 8 + 12) / 31 = 22/31.

(45 - 4 + 44) / 56 = 85/56 = 1 29/56.

(28 + 30 - 5) / 47 = 53/47 = 1 6/47.

(31 + 7) / 90 = 38/90 = 19/45.

(43 - 35) / 51 = 8/51.

(10 + 3 + 9) / 14 = 22/14 = 1 8/14 = 1 4/7.

(24 - 24 + 43) / 45 = 43/45.

(1 + 2 - 2) / 3 = 1/3.

(20 + 7) / 32 = 27/32.

(62 - 59) / 84 = 3/84 = 1/28.

(88 + 37 + 90) / 95 = 215/95 = 2 25/95 = 2 5/19.