40%*10.9%+60%*8.6%
    0.000624^(0.5)
    （5%-8.6%）^2*20%+(8%-8.6%)^2*50%+(12%-8.6%)^2*30%
    0.006544^(0.5）
    （-2%-10.4%）^2*20%+(9%-10.4%)^2*50%+(21%-10.4%)^2*30%
    0.002028^(0.5)
    （3%-10.9%）^2*20%+(11%-10.9%)^2*50%+(16%-10.9%)^2*30%
    20%*5%+50%*8%+30%*12%
    20%*(-2)%+50%*9%+30%*21%
    20%*3%+50%*11%+30%*16%
    cos(4.86666666666666666666)
    cos(48.4)
    27.36/0.104
    12.64/0.528
    90-arctan(0.623)-arctan(0.623/5)-arctan(102.89*0.623)+arctan(16.05*0.623)
    90-arctan(0.623)-arctan(0.623/5)+arctan(102.89*0.623)+arctan(16.05*0.623)
    10/0.156/0.623
    tan(40.35)
    tan(-26*3.14159265/3)
    sin(49.35)

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