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y in (-oo:+oo)
((2^-1)/2)^4*y = 1/8 // - 1/8
((2^-1)/2)^4*y-(1/8) = 0
((2^-1)/2)^4*y-1/8 = 0
1/256*y-1/8 = 0 // + 1/8
1/256*y = 1/8 // : 1/256
y = 1/8/1/256
y = 32
y = 32
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