BlockPy: $11$B$1\mathrm{.}4)$ Evaluate Operator

Math expressions can be represented as trees. We will rename the empty parent dataclass as Expression.

Then, we will have a BinaryExpression dataclass:

operator $($a string, either $\text{'}+\text{'}$ or $\text{'}*\text{'})$

left $($an Expression$)$

right $($an Expression$)$

To actually make this work, we need one further twist: instead of an EMPTY instance, we'll instead have a IntegerExpression dataclass with a single field:

value $($an integer$)$

The function evaluate$\_$math is meant to process these complex Expression trees, and we have already written the logic that will separate out the base case from the recursive case. However, you will need to fill in the rest such that the code correctly evaluates the mathematical expressions.

Note: This probl