sqrt(35.94^2+(33.35-6.1)^2)
    5.4559*1.3805^36
    1.02+2.38*0.18/0.31
    2.06+9.87*0.08/0.52
    2.19-0.04*6.38/1.09
    80-2*23.5
    x*0.65=19
    r^2-12^=(r-5)^2
    (30-10)(20-40)
    x
    2^2-1
    131072/262144+3/2
    4/49-24/144
    4/48-23/144
    4/48
    1-4/48
    (-1)-4/48
    (-1)+(-4)/48
    3/45-1/3
    3^(-2)

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