"cloudwatch" How do I integrate multiple data points?

I’m a beginner.
I want to integrate 4 metrics with Grafana using cloudwatch as data source
I want to make a graph that selects only the maximum value, but I’m having a problem because I can’t do it well.

I think it can be realized with grafana expression, but please tell me how to write it.

I want to select the maximum value of Server 01 to 04 and graph it as shown below.

【Current status with cloudwatch】

【I want to realize with grafana】

※I’m Japanese, I’m sorry I’m not good at English