Mathematics
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    cos(π/2)
    √(1+e2 )+√{25+(8-e)2}
    (245.9-56.4-36.8*2-41.6-8)*14.24/7.98=
    (130*7.98-37*12.02)/14.24=
    235.5-37-8-66.7-43.5*2=
    161*9.96/2/12.02=
    161*9.96/2/14.21=
    80.3/34*60=
    80.3/34=
    131/2*7.98/14.21=
    131/2*7.98/12.02=
    e^e
    1.0e+13 * 0.3795
    90-45-81.87-126.87
    arctan(4/3)
    180+45+98.13-90-143.13
    180-36.87
    arctan(3/4)
    arctan(7)
    arctan(1/7)

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