2/sqrt(5/4)-1/sqrt(17/16)
    2/sqrt(5/4+1)-1/sqrt(17/16+1/2)
    2/sqrt(5/4-1)-1/sqrt(17/16-1/2)
    28*134/135
    44444444*88888888/88888889
    14/23+12/23+10/23+8/23+6/23+4/23+2/23
    1013^2
    459691×2689×127×49×13
    100000001/739
    100000246/5087
    24198/3457
    66782/200
    66782/197
    66783/197
    5999999999999999999999999999/7
    59999999999999999/15467
    5999999999999999/1567
    599999999999999/77251
    5999999999999999/77251
    421200/649

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