a^2（1-a）^2=3/48
    2/3+(4/6)∧2
    (5/2+5y)^2
     x/12*0.5 = 4996
    sqrt(35.94^2+(54.62-6.1)^2)
    sqrt(31.8^2+(54.62-2.94)^2)
    sqrt(35.94^2+(54.47-6.1)^2)
    sqrt(31.8^2+(33.35-2.94)^2)
    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

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