Mathematics
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    90-arctan2.94-arctan0.49
    90-arctan0.12*24.152-arctan0.02*24.152
    (243,551)
    ln1
    log(2,1048576)
    C(49,7)
    4-3
    -4-3
    -6-1=
    -6+1
    -1-10
    1+1
    -20*(22^2)+400*22+6000=
    -(20*22)^2+400*22+6000=
    (ln3)^2
    arctan 20/300
    arctan 20/300
    1+1
    7*11*13*17*19*23*29
    (arcsin1+arccos1)-arcsin(-1)-arccos(-1)

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