2×(0.625×1.5×2×3 0.958×1.5×2×6.5/2 0.958×1.5×6.5)=
    2.718^(-((abs(146-65)^2)/(800)))
    2.718^(-((abs(46-165)^2) / (800)))
    2.718^(-0.45125)
    2×0.00347×2e-4（√（380/0.00347）-1）+15.9×21.34×1.45
    2×0.00347×2e-4（√（380/0.00347）-1）+15.9×21.34×1.45
    -0.9*e(0.1-0.2)
    e(-0.1)
    e(-20)-e(-10)
    (e(-10)-1)e(10-10*1.1)
    (e(-10)-1)*e0
    (e(-10)-1)e(10-10*1.5)
    cos(135)
    tan(0.25π）
    tan0.25π
    2^10000
    0^(-1)
    0^0
    8/10-1 8/X-1=-0.2
    8/10-1 8/X-1

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