Gee error syntaxerror: unexpected token (28:9)

GEE Monthly precipitation calculation

// Image processing and filtering , Here you need to select and add the image data you want to use var annualPrecip = ee.ImageCollection.fromImages( years.map(function (year) { var annual = chirps/ .filter(ee.Filter.calendarRange(2015,2021,'2015-2021'))（ There is an error in this line ） .sum(); return annual .set('year', year) .set('system:time_start', ee.Date.fromYMD(year, 1, 1));}));

Operation results and error reporting contents

SyntaxError: Unexpected token (28:9)
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My solution ideas and tried methods

At a loss

What I want to achieve

Run smoothly
thank you ！