Efetue :

a) [m] + \frac{7}{2} + \frac{5}{3} [/m]

b) [m] -\frac{9}{4} -\frac{5}{2} [/m]

c) [m] + \frac{6}{7} -\frac{3}{5} [/m]

d) [m] -\frac{1}{3} + \frac{10}{9} [/m]

Qual é o valor de [m] x [/m]?

[mm] x = \frac{5}{2} -\begin{bmatrix}
\frac{3}{2} + 4 \cdot \begin{pmatrix}
\frac{7}{8} -\frac{3}{4}
\end{pmatrix}
\end{bmatrix} + 1 [/mm]