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KBgAAH6CYJECBAgIAA+wECBAgQIBAICHCAbpIAAQIECByxcQFpoRMBzwAAAABJRU5ErkJggg==0What is 1 + 2,3,5,1,7What is 9-7,2,3,6,1What is 20 +17,37,123,12,19What is 12-17,-5,5,12,13