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y in (-oo:+oo)
(-5/4)*y-(8*8*(y-2)) = 0
(-5/4)*y-64*(y-2) = 0
(-5*y)/4-64*(y-2) = 0
(-64*4*(y-2))/4+(-5*y)/4 = 0
-64*4*(y-2)-5*y = 0
512-261*y = 0
(512-261*y)/4 = 0
(512-261*y)/4 = 0 // * 4
512-261*y = 0
512-261*y = 0 // - 512
-261*y = -512 // : -261
y = -512/(-261)
y = 512/261
y = 512/261
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