(3-1.4)^2+2.4^2
    lg(42.167*51.839*48.714*28.023*35.691*33.119*35.661*50.046*50.311*49.484*30.496*21.769)
    (1.366*5.3*(2*22-7)*7)/(lg185.934-lg(42.167*51.839*48.714*28.023*35.691*33.119*35.661*50.046*50.311*49.484*30.496*21.769))
    1/e^0.07
    1/e^0.035
    1/e^0.025
    1/e^0.05
    1/e^(-0.035)
    (e^0.07)*106.481-(e^0.07)*5e^(-0.035)
    (e^0.035)*106.481
    3*（1+3.6%）^10+3*（1+3.6%）^9+3*（1+3.6%）^8+3*（1+3.6%）^7+3*（1+3.6%）^6
    15*(1+1.78%)^10
    15*（1+2.75%）^10
    15*（1+3%）^10
    15*（1+3%）=
    100*27/64+200*27/64+300*1/64
    60*27/64+120*27/64+180*9/64+240*1/64
    (4×0.010)/(3.14×〖2.2〗^2 )×3×60
    2.84×10^(-3)×1×(1+0.590)×〖(3600/1.98)〗^(2/3)
    0.153/((〖1.98×0.03955)〗^2 )

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