19×38＋38×57＋57×76＋76×95＋95×114
    11×101×10001×100000001；2200＋220×10＋22×100＋2.2×1000＋0.22×10000＋0.000022×100000000
    11×101×10001×100000001×10000000000000001；2.004＋20.04＋200.4＋2004；12800000×0.24×0.45÷8
    (2－1)(2＋1)(4＋1)(16＋1)(256＋1)(65536＋1)＋1
    sqrt-8
    -(6－9)；1.1×1.01×1.0001×1.00000001×1.0000000000000001
    640000×0.047×20
    2＋24＋246＋2468；11×21＋21×31＋31×41＋41×51；777÷13
    100*（1+5%）3-1/5%
    640000*0.047*20
    4082.80*24-640000
    4082.80*240-640000
    0.8*0.0460*800000/(12*0.047*12.785)
    (1-(1+0.047)^(-20))/0.047
    8*5287.1+69261.01-100000
    225609.44-28201.18
    8*28201.18
    100000-71798.82
    5287.1*13.58
    84593.6-69261.01

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