Mathematics
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    (3.2×10^6)/(0.989×49000×215)
    (9.4×10^(-7)×10^6)/(0.99×166666.68)
    1/(1+〖2.92〗^2/(4.9×1.0×220))
    0.7√(1.0×220)
    √((855×100)/100^2 )
    arccos1.9
    arccos1.87
    104.70+85.00+33.00+5.59+17.82+29.53
    (104.70+85.00+33.00+5.59+17.82)×12%
    sin(5π/4)
    -sin120-sin240
    lnln2
    ln2
    lnln2/ln2 (lnlne^e)/lne^e
    lnln2/ln2 (ln(elne))/lne^e
    lnln2/ln2 (ln(lne^e))/lne^e
    lnln2/ln2 [ln(lne^e)]/lne^e
    lnln2/ln2 ln(lne^e)/lne^e
    lnln2/ln2
    √6*arctan(√(8/6))-arctan(√8)

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