arcsin0.5357
    arccos0.5357
    2^3
    20lg0.03773
    [11*sqrt(50^2*4^2+1)]/[1*sqrt(4^2+1)*sqrt(1+1/16*4^2)*sqrt(1+2500^2*4^2)]
    20lg0.150949
    [11*sqrt(50^2*1^2+1)]/[1*sqrt(1^2+1)*sqrt(1+1/16*1^2)*sqrt(1+2500^2*1^2)]
    20lg15.550134
    [11*sqrt(50^2*0.02^2+1)]/[0.02*sqrt(0.02^2+1)*sqrt(1+1/16*0.02^2)*sqrt(1+2500^2*0.02^2)]
    20lg19438
    [11*sqrt(50^2*0.0004^2+1)]/[0.0004*sqrt(0.0004^2+1)*sqrt(1+1/16*0.0004^2)*sqrt(1+2500^2*0.0004^2)]
    1321003963011889035667107*757
    440334654777631*2270999997729
    49.23×10^-6×6000×24
    sqrt11
    20lg11
    arctan-0.75
    73260.07+83859.97+92153.82+126584.91+128800.28-250000
    73260.07+83859.97+92153.82+126584.91+128800.28
    200000/（1+9.2%）^5=

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