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D( m )
m = 0
m = 0
m = 0
m in (-oo:0) U (0:+oo)
m/2-(1/m) = (6*m+5)/12 // - (6*m+5)/12
m/2-((6*m+5)/12)-(1/m) = 0
m/2-((6*m+5)/12)-m^-1 = 0
(-1*(6*m+5))/12+m/2-1/m = 0
(-1*2*m*(6*m+5))/(2*12*m)+(12*m^2)/(2*12*m)+(-1*2*12)/(2*12*m) = 0
12*m^2-1*2*m*(6*m+5)-1*2*12 = 0
-10*m-24 = 0
(-10*m-24)/(2*12*m) = 0
(-10*m-24)/(2*12*m) = 0 // * 2*12*m
-10*m-24 = 0
-10*m-24 = 0 // + 24
-10*m = 24 // : -10
m = 24/(-10)
m = -12/5
m = -12/5
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