1/3(52.2+42)3.3-84.4+2/3(-89.07+73.94)
    1/3(52.17+42)×3.3-2×89.07/3
    1/3(52.17+42)×3.3-89.07/3
    -(0.7392*10)/!(10)+(0.7392*8)/!(8)-(0.7392*6)/!(6)+(0.7392*4)/!(4)-(0.7392*2)/2-0.7392+1
    (0.7392*4)/!(4)-(0.7392*2)/2-0.7392+1
    1/0.045
    0.01^(1/2)
    （2.35%-2.13%）
    （2.35%-2.0%）*10000000
    （4%-2.35%）*10000000
    （3.23%-2.35%）*10000000
    （2.13%-2.35%）*10000000
    （2.0%-2.35%）*10000000
    0^(3/2)
    25.4+5.92
    （6514.66-6058.47）/77
    25.4×77+57.22×71.7
    25.4×77+57.22×74.5+3.78×78.3
    54/（1-40%）=
    27/（1-50%）=

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