75/cos105
    10.8*525 =
    arctan0.316
    arctan3.16
    arctan0.1446
    arctan1.446
    arcsin（sqrt2/2）
    1+1
    3971.02/7290.20
    1392.87+610.08+421.89+883.74
    3080.63/0.458
    1-0.542
    1-0.542
    1-0.542
    1-0.542
    1-0.542
    2151.5+64.55+248.45+616.13
    1709.29/0.458
    1-0.542
    0.01+0.0002+0.003+0.5288

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