Mathematics
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    1+1
    7*11*13*17*19*23*29
    (arcsin1+arccos1)-arcsin(-1)-arccos(-1)
    arcsin(5)
    -arctan0.05-arctan0.5
    ((112+36.384))/4+(509.4)/(3.315×3.315×4)+0
    [1748×(1+0.054)×1.0910×1+0]×0.9981
    [1-1/(1+8.0%)^65.57]/[1-1/(1+8.0%)^70]=
    4188-2377+3415-2594=
    (1+0.0258)^3.42
    57.58/15.8
    57.58/15.8
    -5.4878*17.91^2+196.57*17.91+1160.9
    (42+20-56)÷2
    (40+20-56)÷2
    (46+20-56)÷2
    (36+20-56)÷2
    0.8*480
    ln[(7.315-0.373*2)/7.315] =
    ln[(7.315-2.53)/7.315]= ln[(7.315-2.216)/7.315]= ln[(7.315-3.6773)/7.315]= ln[(7.315-2.753)/7.315]=

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