src/Bot/ExpressionBot.php
public function execute(CommandInterface $command)
    {
        try {
            $response = (string) $this->evaluate($command, $this->getValues($command));
        } catch (SyntaxError $badSyntax) {
            $response = $badSyntax->getMessage();
        }

        return $this->say($response);
    }
public function execute(CommandInterface $command)
    {
        try {
            $response = (string) $this->evaluate($command, $this->getValues($command));
        } catch (SyntaxError $badSyntax) {
            $response = $badSyntax->getMessage();
        }

        return $this->say($response);
    }
@param CommandInterface $command

@return \Crummy\Phlack\WebHook\Reply\Reply