3*4*(n-2)^2-2*3*(n+4)*(n-2)+2*(6*n-4)=0
    4*(n-2)^3-3*(n+4)*(n-2)^2+2*(6*n-4)*(n-2)-(8*n-12)=0
    (n)^4-(n+4)*(n)^3+(6*n-4)*(n)^2-(8*n-12)*(n)+2*n=0
    x^5-(8+6)*x^4+(8*8+3)*x^3-(19*8-22)*x^2+(14*8-15)*x-3*8=0
    x^5-(6+6)*x^4+(8*6+3)*x^3-(19*6-22)*x^2+(14*6-15)*x-3*6=0
    16.38X+6300-77136.42-(16.38X+6300)/(1+9%)*3%*1.12-(16.38X+6300)*0.05%-591.64-(16.38X-16.38X/(1+9%)*3%)*1.5%-91.9=0
    5350X+6300-77136.42-(5350X+6300)/(1+9%)*3%*1.12-(5350X+6300)*0.05%-591.64-(5350X-5350X/(1+9%)*3%)*1.5%-91.9=0
    x^6-(10+7)*x^5+(9*10+10)*x^4-(28*10-18)*x^3+(36*10-42)*x^2-(18*10-14)*x+3*10=0
    144+16x²=180-60x+5x²
    3*(n-2)^2-2*(n+2)*(n-2)+(3*n-2)=0
    (n)^3-(n+2)*(n)^2+(3*n-2)*(n)-n=0
    (n-2)^3-(n+2)*(n-2)^2+(3*n-2)*(n-2)-n=0
    3*(n-2)^2-2*(n+2)*(n-2)+(4*n-7)=0
    (n)^3-(n+2)*(n)^2+(4*n-7)*(n)-n=0
    2/d+1/(d-10)+1/(d-20)=1/(d-5)
    ((58.98+x)*1.065-x)*0.02=x
    ((56.98+x)*1.065-x)*0.02=x
    ((55.02+x)*1.065-x)*0.02=x
    45-x=20+x
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*3.6544)

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