1) 630140:70x70+60x754-11223:87 2) 98754-3268x(6075+9980-15996):38 3) (20000-5163):37-16006:(4558:86) 4) (18305:7-2880:18)x74-157930

630140 / 70 * 70 + 60 * 754 - 11223 / 87 = 675251 1) 630140 / 70 = 9002 2) 9002 * 70 = 630140 3) 60 * 754 = 45240 4) 11223 / 87 = 129 5) 630140 + 45240 = 65380 6) 675380 - 129 = 675251 98754 - 3268 * ( 6075 + 9980 - 15996 ) / 38 = 93680  1) 6075 + 9980 = 16055 2) 16055 - 15996 = 59 3) 3268 * 56 = 192812 4) 192812 / 38 = 5074 5) 98754 - 5074 = 93680 ( 20000 - 5163 ) / 37 - 16006 / ( 4558 / 86 ) = 99 1) 20000 - 5163 = 14837 2) 4558 / 89 = 53 3) 14837 / 37 = 401 4) 16006 / 53 = 302 5) 401 - 302 = 99 ( 18305 / 7 - 2880 / 18 ) * 74 - 157930 = 23740 1) 18305 / 7 = 2615 2) 2880 / 18 = 160 3) 2615 - 160 = 2455 4) 2455 * 74 = 181670 5) 181670 - 157930 = 23740