Mathematics
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    25^2-24^2
    1.5√20
    65635478322248/5444755324478863324896555587423/554566558.6658788657755545566.555478865558545524+55852147856614788/211477555635889654477895588866624+54422236657444888886524788952/44444455588663589
    65563588966+47556688875-542447566
    8*200*0.97-(7*2.5)
    (199.99*28*0.97)-(2.4*27)-5354
    2306.5+69.20+38.18
    105×[(1+0.031)-1]+(2100+80+0+21.5+69.20)×[(1+0.031)^0.5-1]
    arccos(0.9692)
     3^√(2 × 1.3 × 0.99 × 100000 ÷ 0.8 ÷ 18 ÷ 18 × 0.0096 × cos(15)× cos(15))
     3√(2 × 1.3 × 0.99 × 100000 ÷ 0.8 ÷ 18 ÷ 18 × 0.0096 × cos(15)× cos(15))
     3√(2 × 1.3 × 9.9 × 100000 ÷ 0.8 ÷ 18 ÷ 18 × 0.0096 × cos(15)× cos(15))
     3√(2 × 1.3 × 9.9 × 105 ÷ 0.8 ÷ 18 ÷ 18 × 0.0096 × cos(15)× cos(15))
    [1-11/(11+39)×(1-2%)]×100%
    2306.5+69.20+38.18
    (0.01+0.0002)×20%
    (2306.5+69.20+38.18)×20%
    0.01×[(1+0.031)^0.5-1]
    105×[(1+0.031)-1]+(2100+80+0+21.5+69.20)×[(1+0.031)^0.5-1]
    lg3

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