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y in (-oo:+oo)
(-1/(-2))*y-y-(1/4) = (1/64)*(y-6) // - (1/64)*(y-6)
(-1/(-2))*y-((1/64)*(y-6))-y-(1/4) = 0
(-1/64)*(y-6)+(-1/(-2))*y-y-1/4 = 0
y/2-1/64*(y-6)-y-1/4 = 0
(-1/64*2*4*(y-6))/(2*4)+(4*y)/(2*4)+(2*4*(-y))/(2*4)+(-1*2)/(2*4) = 0
4*y-1/64*2*4*(y-6)+2*4*(-y)-1*2 = 0
31/8*y-8*y-2+3/4 = 0
3/4-33/8*y-2 = 0
-33/8*y-5/4 = 0
(-33/8*y-5/4)/(2*4) = 0
(-33/8*y-5/4)/(2*4) = 0 // * 2*4
-33/8*y-5/4 = 0
-33/8*y-5/4 = 0 // + 5/4
-33/8*y = 5/4 // : -33/8
y = 5/4/(-33/8)
y = -10/33
y = -10/33
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