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    1+32-8 √2
    1/sqrt(10/9)
    17591×0.025÷0.028×0.005÷0.144×7×24÷5×0.0998×0.099.5
    53131×0.025÷0.028×0.005÷0.144×7×24÷5×0.0998×0.099.5
    74901×0.025÷0.028×0.005÷0.144×7×24÷5×0.0998×0.099.5
    arctan(sin20/(2*cos40-cos20) )
    1.26/1.34
    1.8^0.5
    (0.75/5.4)^0.5
    (5.4*0.025)^(1/2)
    lg(5.4)
    1/1.85
    6.3^(1/3)
    753.3-750/(7.5/5)
    72-4/3
    (π-arctan(sqrt(1-0.627^2)/0.627))/(3*sqrt(1-0.627^2))
    (π-arctan(sqrt(1-0.07085^2)/0.07085))/(3*sqrt(1-0.07085^2))
    (78/5)*(378/25)*(3133/200)
    15.6*15.12*15.665
    1+2+3

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