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m in (-oo:+oo)
(-51/4)*(2*m+1) = 6*m+1761/4 // - 6*m+1761/4
(-51/4)*(2*m+1)-(6*m)-(1761/4) = 0
(-51/4)*(2*m+1)-6*m-1761/4 = 0
-51/4*(2*m+1)-6*m-1761/4 = 0
(-51/4*4*(2*m+1))/4+(-6*4*m)/4-1761/4 = 0
-51/4*4*(2*m+1)-6*4*m-1761 = 0
-126*m-1761-51 = 0
-126*m-1812 = 0
(-126*m-1812)/4 = 0
(-126*m-1812)/4 = 0 // * 4
-126*m-1812 = 0
-126*m-1812 = 0 // + 1812
-126*m = 1812 // : -126
m = 1812/(-126)
m = -302/21
m = -302/21
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