Syntax Issue
<f:format.crop maxCharacters="{f:if(condition: '{data.rmce_select2} == 200', then: 7)} {f:if(condition: '{data.rmce_select2} == 300', then: 16)} {f:if(condition: '{data.rmce_select2} == 500', then: 38)}"> {image.description} </f:format.crop>