lg!(10)
    ln!(e)
    lg!(15)
    tan!(6)
    !(sin(5))
    !(e4)
    !(log(2,3))
    !(0.5)
    C(2,3,4,-1)
    A(2,3,4,-1)
    A(2,3,4,5)
    A(2,3)
    A(2,3,4)
    1-（1/2∧9）/1-1/2
    6518432+5935942+9672538=
    6518432+5935942+9672538
    A(8,4,2,0,1/2)
    ln(4,225)
    lg(4,225)
    78+88+88+69+79+69+138+59+45+29+42+42+29+158+38+98+28+128+168+128+26+98+88+29+10+8+10+10

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