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m in (-oo:+oo)
(1/6)*(m-1) = (2/3)*(m+2)-((1/3)*m) // - (2/3)*(m+2)-((1/3)*m)
(1/6)*(m-1)-((2/3)*(m+2))+(1/3)*m = 0
(1/6)*(m-1)+(-2/3)*(m+2)+(1/3)*m = 0
1/6*(m-1)-2/3*(m+2)+m/3 = 0
(1/6*3*(m-1))/3+(-2/3*3*(m+2))/3+m/3 = 0
1/6*3*(m-1)-2/3*3*(m+2)+m = 0
m-3/2*m-9/2 = 0
-1/2*m-9/2 = 0
(-1/2*m-9/2)/3 = 0
(-1/2*m-9/2)/3 = 0 // * 3
-1/2*m-9/2 = 0
-1/2*m-9/2 = 0 // + 9/2
-1/2*m = 9/2 // : -1/2
m = 9/2/(-1/2)
m = -9
m = -9
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