Mathematics
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    0.5×722.14×1.78×1.78=
    0.5×722.14×6.6/2×6.6/2-2345.418×(6.6×0.5-1.78)
    (2420.717+2345.418)/6.6
    (406.56+3564.128)/(2.8×6.6)
    (517.73+9001.72)/17.55
    (406.56+3564.128×2)/(2.8×6.6) =
    3564.128/6.6/(217.28-20×1.1)
    254.117×1000000/189216
    0.9×(600-16)×360=
    218.878×27.864/24=
    (224.275+213.48)/2=
    -1/7
    12345*2345+2469*38275;8127+6345+4563+2781;123456+234561+345612+456123+561234+612345
    999999*555555-222222*999999;8+8+16+8+16+24+8+16+24+32+8+16+24+32+40;111111222222*5;38383838+47474747+38383838+47474746
    1+11+111+1111+11111+111111;1*15+2*14+3*13+4*12+5*11+6*10+7*9+8*8
    111111110888888889/【12345678987654321*9】;24242424*13131313/24/13;12345678987654321*999999999/111111111
    44444435555556/9;333332666667-【333333*999999-555555】;43333+73333*43333
    123456789*1000000008+9;2469135802469*5;888888888*999999999-777777777*888888888
    12345*2345+2469*38275;2469*5;12345*2345+2469*5*7655;12345*【2345+7655】;12345*10000
    【45555+4555+455+45+5】/5+111105/【10-1】

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