$\begin{align*} &E\rightarrow E+E \qquad {\color{red}{\text{E.val} = \text{E}_1\text{.val} { \;\;\large + \;\; } \text{E}_2\text{.val}}} \\ &E\rightarrow E*E \; \qquad {\color{red}{\text{E.val} = \text{E}_1\text{.val} { \;\;\large - \;\; } \text{E}_2\text{.val}}} \\ &E\rightarrow E - E \qquad {\color{red}{\text{E.val} = \text{E}_1\text{.val} { \;\;\large * \;\; } \text{E}_2\text{.val}}} \\ &E\rightarrow \left ( E \right ) \;\;\; \; \qquad {\color{red}{\text{E.val} = \text{E}_1\text{.val}}} \\ &E\rightarrow \text{id} \;\;\; \; \;\;\; \qquad {\color{red}{\text{E.val} = \text{id}\text{.val}}} \\ \\ &\text{What is that value of the attribute comupted at the root when the expression} \\ &{\large\color{blue}{\left [ \left ( 3*3 \right )+\left ( 3*5 \right ) - 6 \right ]+7}} \quad \text{is evaluated using above SDT ?} \\ \end{align*}$