Mathematics
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    e5
    tan90
    sin72
    20*lg(5/(sqrt(2)*sqrt(1.0625))
    arctan3.94
    √841-9
    arctan25
    (sqrt(24)-sqrt(11/6+2sqrt(2/3)))-(sqrt(1/8)+sqrt(6))
    (2/9)/(4/3)=
    π/2-arctan-125+arctan75
    π/2-arctan-125-arctan75
    π+arctan-125-arctan75
    π-arctan-125+arctan75
    π-arctan-125-arctan75
    π/2-arctan75
    π/2-arctan125
    arctan375-arctan-75
    arctan75-arctan-75
    arctan375-arctan75
    1/sin(1/7.66)

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