2x>1-x x+2<4x-1 x-5>1+2x 3x+2<=4x
    2x-1<4
    x+1/2>3
    (0.007/(0.5a-0.02))+(0.016/(0.5a-0.01))≤0.72727
    (0.007/(0.5a-0.02))+(0.016/(0.5a-0.01))≤0.45454
    t∧2－17t－12＜0
    t2－17t－12＜0
    （264*7+88x）/（264*88）<0.17
    （264*7+88x）/（264*88）<0.22
    （264*7+88x）/（264*88）<0.27
    x^2-5x+6=>0
    5－2x＜1
    5－2x＜－4
    0
    (1/(0.5a-0.01))+(1/(0.5a-0.02))≤18.18
    (1/(0.5a-0.001))+(1/(0.5a-0.02))≤18.18
    (1/(0.5a-0.055))+(1/(0.5a-0.01))≤50
    5x+2>3(2+x) ((2x-1)/4)-((1+x)/6)≤1
    (1/(0.5a-0.02))+(1/(0.5a-0.01))≤18.1818
    (1/(0.5a-0.1))+(1/(0.5*0.5-0.02)+(1/(0.5*0.5-0.06))≤(0.5a/((0.5a-0.1)*0.1))

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