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D( m )
5*m = 0
2*m = 0
5*m = 0
5*m = 0
5*m = 0 // : 5
m = 0
2*m = 0
2*m = 0
2*m = 0 // : 2
m = 0
m in (-oo:0) U (0:+oo)
(m-2)/(5*m)-(3/(2*m)) = 5/4 // - 5/4
(m-2)/(5*m)-(3/(2*m))-(5/4) = 0
(m-2)/(5*m)+(-3/2)*m^-1-5/4 = 0
(m-2)/(5*m)-3/(2*m)-5/4 = 0
(2*4*m*(m-2))/(2*4*5*m*m)+(-3*4*5*m)/(2*4*5*m*m)+(-5*2*5*m*m)/(2*4*5*m*m) = 0
2*4*m*(m-2)-5*2*5*m*m-3*4*5*m = 0
8*m^2-50*m^2-76*m = 0
-42*m^2-76*m = 0
-42*m^2-76*m = 0
-2*m*(21*m+38) = 0
21*m+38 = 0 // - 38
21*m = -38 // : 21
m = -38/21
-2*m*(m+38/21) = 0
(-2*m*(m+38/21))/(2*4*5*m*m) = 0
(-2*m*(m+38/21))/(2*4*5*m*m) = 0 // * 2*4*5*m*m
-2*m*(m+38/21) = 0
( -2*m )
-2*m = 0 // : -2
m = 0
( m+38/21 )
m+38/21 = 0 // - 38/21
m = -38/21
m in { 0}
m = -38/21
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