2.33-8.376(0.003^(2/3)) =
    e（-7.35）
    0.623×√(2.102+10.812*(0.006^(2/3)))
    0.623×√(2.102+10.812*(0.005^(2/3)))
    0.623×√(2.102+10.812*(0.004^(2/3)))
    0.623×√(2.102+10.812*（0.003^(2/3) )）
    0.623×√(2.102+10.8120.003^(2/3) )
    1-0.619-0.359
    0.8*0.0460*800000/(12*0.047*15.9124)
    (1-1.047^(-30))/0.047
    100*8000*0.8
    1.1-0.65×2.01/0.01256×288.15
    133.90×10^6/0.87/567/942
    1/8（1.3×16＋1.5×0.5×7.5）6.367^2
    1/8（1.3×16＋1.5×0.5×7.5）6.367^6
    1.1-0.65×2.01 /0.01256×290.06
    134.07×10^6/0.87/564/942
    1/8（1.3×16＋1.5×0.5×7.5）6.3712
     1＋1/1300（120×106/2600×103+20）/460（7371/500）2×0.69
    134.07×10^6/0.87×564/942

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