1-sqrt（1-0.49^2）/2
    10^0.483
    0.0286÷0.0592
    3.63*0.34+0.94*0.87*2+1.60*2.13+3.88*1.7
    (2*3.14/0.1)*sin(70/180*3.14)*(-1.2*0.1)
    3.40*2.15+3.91*2.63+2.64*3.61+2.65*3.36
    340*215+391*263+264*361+265*336
    (2*3.14/0.1)*sin(70/180*3.14)*(-1*0.1)
    (2*3.14/0.1)*sin(70/180*3.14)*(-0.8*0.1)
    (2*3.14/0.1)*sin(70/180*3.14)*(-0.6*0.1)
    (2*3.14/0.1)*sin(70/180*3.14)*(-0.4*0.1)
    (2*3.14/0.1)*sin(70/180*3.14)*(-0.2*0.1)
    (2*3.14/0.1)*sin(70/180*3.14)*(-0.05*0.1)
    0.3419+0.0858
    -3×0.286
    lg0.001
    1189*544*71/8
    47×552
    (8000/8) + ((((8000 + 1024) - 512)/2)/131072)
    ( 8000 ) / 4 + ((1024 - 512) / 262144)

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