(2x^2-16x+64)^(1/2)+(2x^2-8x+16)^(1/2)= 4*(6)^(1/2)
    (2x^2-16x+64)^(1/2)+(2x^2-8x+16)^(1/2)= 4*(4)^(1/2)
    (2x^2-16x+64)^(1/2)+(2x^2-8x+16)^(1/2)= 4*(5)^(1/2)
    (2x^2-16x+64)^(1/2)+(2x^2-8x+16)^(1/2)= 4*(10)^(1/2)
    （2x^2-16x+64)^1/2+(2x^2-8x+16)^1/2=4*(10)^1/2
    （2x^2-16x+64)^1/2+(2x^2-8x+16)^1/2=4*(5)^1/2
    sqrt(2x^2-16x+64)+sqrt(2x^2-8x+16)=4*sqrt(5)
    1/d+1/(d+1)+1/(d+15)＝0
    x^5+4*x^4+4*x^3+8*x^2+10*x+6=0
    (0.000064+X)/(0.009936-X)=162.18101
    tanx=x
    (y+1)/3+(5+y)/12=3-(y-1)/4
    x*cos(sqrt(50/x))=50
    48-2.5x=20
    -2x²+35x-150＝0
    0.2xX0.15=660
    X∧3-75X=-250
    X3-75X=-250
    2+a=√（a²+1）
    2t/(16-3t)=2

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