Mathematics
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     x/12*0.5 = 4996
    (1/40+1/48+1/60)*4
    0 = x^2+x-3
    200×(1+2a%)×100+50×(1+6a%)×160
    3/7+6/13
    2/3+5/7
    1/60101
    1/19
    (2/3)/(2/105)
    (2/3)÷(2/105)
    1/28-1/60
    1÷28-1÷60
    3x^(2)-6x-1 = 0
    q^3-2q^2+q+2
    q^3-2q^2-q-2
    3x=4/7
    x+1/x=-1,x^2019+1/x^2019
    x^2-4x/x+3÷4x-x/x
    8
    -62x=-32(x➗(1-x)^5)+1

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