4600*0.214
    sin(-63(1+sin-2*63))/(sin-63+cos-63)=
    sin-63(1+sin-2*63)/(sin-63+cos-63)=
    sin-63(1+sin-2*63)/sin-63+cos-63=
    sin63(1+sin2*63)/sin63+cos63=
    sin（63）
    1+740/1343
    4200*1/8=
    0.28*0.25*0.21*0.18*0.15*0.12*0.08
    0.28*0.25*0.21*0.18*0.15*0.12*0.08*0.05
    3+2-5
    sin80/sin40
    35+(931)/990
    2^6
    (62.53×1.2×01×1000)/(3.14×9^2 )
    (62.53×1×1×1000)/(3.14×9^2 )
    -32^(-4/5)
    871090*0.2*60
    （5065.5+24884.375）*3.125*1.45*3.95*1.625
    （5065.5+24884.375）*3.125*1.45*3.95

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