2cos108
    0.6×1.67×1.230
    696.03/(339.31×1.230)
    76.50＋(424.98－76.50)(2×7.353)/19.5
    1613.98×（1－(4×7.353 ^2)/(19.5^2 )）
    1×1×1.1×0.45×10^(-3)×200×1242*√((2+0.6×0.303)*√35×0.00201×330)+0.75×10^(-3)×330×(760+502+760+502)×0.707
    1×1×1.1×0.45×10^(-3)×200×1426√((2+0.6×0.656)√35×0.00201×250)
    1×1×1.1×0.45×10^(-3)×200×1242*√((2+0.6×0.303)*√35×0.00201×330)+0.75×10^(-3)×330×(760+502+760)×0.707
    1×1×1.1×0.45×10^(-3)×200×1242√((2+0.6×0.303) √35×0.00201×330)+0.75×10^(-3)×330×(760+502)×0.707
    1×1×1.1×0.45×10^(-3)×200×1449√((2+0.6×0.217) √35×0.00201×250)
    4.8÷0.5÷0.2
    1/2乘60%
    1×1×1.1×0.45×10^(-3)×200×1242√((2+0.6×0.303) √35×0.00201×330)
    100×760/(200×1255)
    0.6×1.28×1.242
    569.08/(356.89×1.242)
    76.50+(424.98－76.50)(2×7.845 )/19.5
    1.3×7387.497×(273+240)/273
    1.3×298.662×(1.29×273/(273+25))/(1.30×273/(273+240))
    25.5-7.20+195.77+25.016+59.576

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