<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _EvaluateExpressions(self, frame):
 """Evaluates watched expressions into a string form. If expression evaluation fails, the error message is used as evaluated expression string. Args: frame: Python stack frame of breakpoint hit. Returns: Array of strings where each string corresponds to the breakpoint expression with the same index. """

    return [self._FormatExpression(frame, expression) for expression in
            self._definition.get('expressions') or []]