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x in (-oo:+oo)
4*a-3 = 13/a+z+1 // - 13/a+z+1
4*a-(13/a)-z-3-1 = 0
4*a-13*a^-1-z-3-1 = 0
4*a-13*a^-1-z-4 = 0
x naleu017Cy do R
x in (-oo:+oo)
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