1240, 1420, 1024, 1042, 2140, 2410, 2014, 2041, 4210, 4120, 4012, 4021, 1204, 1402, 2104, 2401, 4102, 4201
821-379=442
7558+442=8000 искомое число
(-X-18 1/3)+(-19 2/7+y)= -x - 18 1/3 - 19 2/7 + y = -x + y - 37 13/21
(b-73 6/7)+(-100+c)= b - 73 6/7 - 100 + c = b + c - 173 6/7
(-61 2/9-k) +(t-68 1/6)= -61 2/9 - k + t - 68 1/6 = -k + t - 129 7/18
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