.Setup time +.Repair time +.Cleanup time  this my custom calculation field but i am getting the error what is the problem for me

Invalid expression or reference: line 1:7 extraneous input 'time' expecting {<EOF>, '-', '+', '=', '*', '/', '%', '<', '>', '<=', '>=', '==', '!=', '<>', '^=', '~=', '&&', '||', '?', '+=', '-=', '*=', '/=', '%=', '.'} .Setup time+.Repair time+.Cleanup time ^^^^ line 1:20 extraneous input 'time' expecting {<EOF>, '-', '+', '=', '*', '/', '%', '<', '>', '<=', '>=', '==', '!=', '<>', '^=', '~=', '&&', '||', '?', '+=', '-=', '*=', '/=', '%=', '.'} .Setup time+.Repair time+.Cleanup time ^^^^ line 1:34 extraneous input 'time' expecting {<EOF>, '-', '+', '=', '*', '/', '%', '<', '>', '<=', '>=', '==', '!=', '<>', '^=', '~=', '&&', '||', '?', '+=', '-=', '*=', '/=', '%=', '.'} .Setup time+.Repair time+.Cleanup time ^^^^