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Mathinline
body--uriencoded--$$ \normalsize \begin%7Bcases%7D N_0(u) = 0.5 u (u-1) \\ N_1(u) = 0.5 u (u+1) \\ N_2(u) = 1 - u%5e2 \\ \end%7Bcases%7D \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad \qquad (2) $$