How to define current date + 10 days as dynamic variable?

How to define current date + 10 days as dynamic variable?

I would like a flow to update the start and end dates to "current date" (start) and "current date + 10 days" (end). 
Can I modify this statement? - 
${system.zf_current_date}${system.zf_current_date}

Any advice appreciated. 

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