Mathematics
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    2.84/71
    0.01*115
    3.99-0.01*60
    2*0.003/20/0.1*1000
    24.55*0.02*5/25/0.049
    24.55*0.02*5/25/0.0049
    7 × 8 + 30 × 14
    16 × 24 ÷ 2 + 32 × (36 - 16) ÷ 2
    xln(x/0.025) = 0.0138
    xln(x/0.025)=0.0199
    xlnx-xln0.025=0.0257
    sqrt[(2x)^2-x^2]
    arccos0
    arccos-0.6
    arccos0.6
    arccos0.8
    e3a=8
    (x-20)(-2x+80)
    (252+180)/36
    (252-180)/34

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