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x in (-oo:+oo)
((t^4)/5)*(m-1)-((1/5)*m) = 1 // - 1
((t^4)/5)*(m-1)-((1/5)*m)-1 = 0
((t^4)/5)*(m-1)+(-1/5)*m-1 = 0
1/5*t^4*(m-1)-m/5-1 = 0
(1/5*5*t^4*(m-1))/5-m/5+(-1*5)/5 = 0
1/5*5*t^4*(m-1)-m-1*5 = 0
m*t^4-m-t^4-5 = 0
(m*t^4-m-t^4-5)/5 = 0
(m*t^4-m-t^4-5)/5 = 0 // * 5
m*t^4-m-t^4-5 = 0
x belongs to the empty set
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