mathematica:2/(3/(3/(3/(3/(3 + 1) + 1/(3 + 1)) + 1/(3/(3 + 1) + 1/(3 + 1))) + 1/(3/(3/(3 + 1) + 1/(3 + 1)) + 1/(3/(3 + 1) + 1/(3 + 1)))) + 1/(3/(3/(3/(3 + 1) + 1/(3 + 1)) + 1/(3/(3 + 1) + 1/(3 + 1))) + 1/(3/(3/(3 + 1) + 1/(3 + 1)) + 1/(3/(3 + 1) + 1/(3 + 1))))) sig=mfouiy