3X－2/2＝2X－3
    ln[(7.315-0.373X2)/7.315] =
    ln[(7.315-0.373x2)/7.315] =
    X/5.5-24=X/6+24
    ln[(7.315-0.373x2)/7.315]= ln[(7.315-0.517x3)/7.315]= ln[(7.315-0.652x4)/7.315]= ln[(7.315-0.624x5)/7.315]= ln[(7.315-0.637x5)/7.315]=
    X^3-（104.2135-1.3167（-5））X^2-24100=0
    x^2-21x+36=0
    1/6+x=5/8
    3/4x=64
    5.5（24+X）=6(24-X)
    0.9x-35=35×0.15
    3/4x=64
    11/8x=33/13
    -x^3+9x+4=0
    x/10=(300+x)/20
    2x+156−x=39
    x/10=(300+x)/20
    arctan (5x )=90
    （sin（x））^4*cosx
    2x*x-0.047x-2*0.51*x＋0.047*0.51-5.4*10∧(-12)＝0

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