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    0.84x×1.15=1.25x-142
    0.85x×1.15=1.25x-142
    2450*x*x-565*x+32=0
    2450x*x-565*x+32=0
    x=14*(x+1)*(x+1)-5
    2450*y*y-565*y+32=0
    2450*x^2-565*x+32=0
    y = 0.4*((35*y-4)*(35*y-4))
    x = 0.4*((35*x-4)*(35*x-4))
    x=0.4*((35*x-4)^2)
    0.4*(35*x-4)^2=x
    -4n²+90n-144=0
    (651252.61 +x)*(1+0.12+0.1+0.007+0.003)+297470=2677183.6
    (670560.00 +x)*(1+0.12+0.1+0.007+0.003)+295300=2716542.98
    1/(1+x^2)
    (456861.05+x)*(1+0.12+0.1+0.007+0.003)+314500=2583751.45
    2h+1/10-2h/10=0.04
    8h²+8h+20=4
    a^3+a^2+a=8
    4=(4÷3k)(4÷3k)+(3-4÷(3k×k)(3-4÷(3k×k)

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