Mathematics
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    -1+2÷3×1/3
    -2/1e2+60e+1200
    -2/1e3+60e+1200
    arctan(5.1/5.8)
    arctan(5.1/5.9)
    1 ×1×1.1× 0.45×10^(-3)×200×1230√((2+0.6×0.618)√35×0.00201×330)+0.75×10^(-3)×330×(1520+402)×0.707
    1 ×1×1.1× 0.45×10^(-3)×200×1230√((2+0.6×0.618)√35×0.00201×330) +0.75×10^(-3)×330×(1520+402)×0.707
    0.6×1.78×1.23
    0.6×1.78×12.3
    731.88/(334.125×1.23)
    76.50+(424.98-76.50)(2×7.208 )/19.5
    1613.98×(1-(4×7.208 ^2)/(19.5^2 ))
    20lg(10/(4.4(((4.4)^2+1)^0.5)
    20lg(30/(2.73((0.01(2.73)^2+1)^0.5)((0.04(2.73)^2+1)^0.5))
    953.95/(299.348×1.217)
    20lg(30/(2.7((0.01(2.7)^2+1)^0.5)((0.04(2.7)^2+1)^0.5))
    1613.98×(1-(4×6.235 ^2)/(19.5^2 ))
    1×1×1.1×0.45×10^(-3)×200×1217√((2+0.6×0.937)√35×0.00201×330)+0.75×10^(-3)×330×(2281+509)×0.707
    100×2281/(200×1217)
    1645.43/(299.35×1.217)

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