【1/2+1/3+1/4+1/5】+【2/3+2/4+2/5】+【3/4+3/5】+4/5
    100000000000000000000000000000001/8888888888888888888
    4111111111119/6738557
    799999992/99999999
    732026/44444/33333
    443084/55555
    335/118；246/67；5793/684
    427/29
    2/3；5/80；3/21
    2*65756
    2689*1440+1441*7311
    3773*2772+3773*4774
    7+87+887+8887+88887；【10-1】+【100-1】+【1000-1】+【10000-1】+【100000-1】
    41+253*7768；28/14+76/38+55/275*10
    28+762+1142+568+37+3775+4444+228
    57＋696+266= 468＋856+213= 578＋999+921= 5789＋458+543= 46＋256+728= 4567＋726+501= 798＋168+750= 58＋332+121=
    419+489＋119= 811+296＋132= 230+177＋112= 275+421＋132= 395+246＋278= 487+435＋243= 41＋391+589= 6778＋356+457=
    101＋323+291= 203＋387+833= 113＋195+676= 902＋968+825= 678＋964+103= 2018＋686+936= 67＋921+231= 28＋302+355=
    537+385＋66= 123＋3104+534= 861+146＋231= 558+321＋222= 459+886＋1222= 2108＋473+577= 733+530＋906= 139+312＋203=
    1736+2275= 4671+2433= 1833+2232= 5254+2412= 1188+2114= 1676+2362= 1961+2002= 7168+2308=

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