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m in (-oo:+oo)
m/2 = m+5/4 // - m+5/4
m/2-m-(5/4) = 0
m/2-m-5/4 = 0
-1/2*m-5/4 = 0 // + 5/4
-1/2*m = 5/4 // : -1/2
m = 5/4/(-1/2)
m = -5/2
m = -5/2
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