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a in (-oo:+oo)
a = (((a+1)/4+1)/3+1)/2 // - (((a+1)/4+1)/3+1)/2
a-((((a+1)/4+1)/3+1)/2) = 0
(-1*(((a+1)/4+1)/3+1))/2+a = 0
(-1*(((a+1)/4+1)/3+1))/2+(2*a)/2 = 0
2*a-1*(((a+1)/4+1)/3+1) = 0
23/12*a-17/12 = 0
(23/12*a-17/12)/2 = 0
(23/12*a-17/12)/2 = 0 // * 2
23/12*a-17/12 = 0
23/12*a-17/12 = 0 // + 17/12
23/12*a = 17/12 // : 23/12
a = 17/12/23/12
a = 17/23
a = 17/23
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