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m in (-oo:+oo)
7*m-((2/3)*m)+5/8 = -443/264 // + -443/264
7*m-((2/3)*m)+5/8-(-443/264) = 0
(-2/3)*m+7*m+5/8+443/264 = 0
19/3*m+76/33 = 0 // - 76/33
19/3*m = -76/33 // : 19/3
m = -76/33/19/3
m = -4/11
m = -4/11
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