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    -7/2x^2+110x=200
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*1.63016)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*1.707818)
    (3-0.5t)^2+(8-2.4t)^2=(6-t)^2
    (3-0.5t)^2+(8-2.4t)^2=(10-3t)^2
    0.16x^2+0.4x=16
    -4(x+1)(x-2)=1
    -3(x+1)(x-2)=1
    -2(x+1)(x-2)=1
    (1+(1/x))^2-1
    (1+x)^2-1
    (1+x)^2+1
    (x-2)^2=125
    2(x+0.01)(x+1.67)(x+0.1)+x(x+1.67)(x+0.1)-x(x+0.01)(x+0.1)-x(x+0.01)(x+1.67)=0
    (1/3125)x=3121
    280x=240(x+4)
    (1+x)²+x²=5
    2x²+2x=√5-1
    144-4t(6-t)=108
    4t(6-t)=32

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