40*tan15
    e(-e(-5.47))
    0.5×650.23
    1-√（1-2×0.002842）
    40.64*1000000/(1*14.3*1000*1000*1000)
    40.64/(1*14.3*1000*1000*1000)
    2378.73×(7.778741-3.625993)/(17.1+2.29-0.4)
    2378.73×(7.778741-3.625993)/(17.1+2.29)
    (1285.86×(15.1/3×(2×14.28+207.42)/(14.28+207.42)+2.29]-1093×(2.29/3×(2×428.04+526.63)/(428.04+526.63)))/2378.73
    (18.69×(1.78/3+15.1+2.9)+2077.84×(15.1/3×（2×35.68+239.53）/（35.68+239.53）+2.9)+282.18×(2.29/3×（2×115.01+131.44）/(115.01+131.44)))/2378.73
    18.69×(1.78/3+15.1+2.9)+2077.84×(15.1/3×（2×35.68+239.53）/（35.68+239.53）+2.9)+282.18×(2.29/3×（2×115.01+131.44）/(115.01+131.44))
    (1285.86×(15.1/3×(2×14.28+207.42)/(14.28+207.42)+2.29)-1093×(2.29/3×(2×428.04+526.63)/(428.04+526.63))/2378.73
    【（48.5+17.9）*2-0.5*26】*3.144*（3.9-0.6）-4*3.0*1.8*（3.144-0.4）-11*4.5*1.8*（3.144-0.4）-4*2.4*1.8*（3.144-0.4）=
    【（48.5+17.9）*2-0.5*26】*3.144*（3.9-0.6）-4*3.0*1.8*（3.144-0.4）-11*45*1.8*（3.144-0.4）-4*2.4*1.8*（3.144-0.4）=
    （2-0.22）× 21/2 + 15.1×（35.68+239.53）/2
    A(3,3)
    0.42+1.4*e（-0.0538*15.666314 ）
    0.09+3.05*15.941397^(-0.5)
    0.09+3.05*14.925783^(-0.5)
    0.09+3.05*13.907215^(-0.5)

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