Expression 1: "f" left parenthesis, "x" , right parenthesis equals Start sum from "n" equals 1 to 15, end sum, StartFraction, sin left parenthesis, "n" "x" , right parenthesis Over "n" , EndFractionfx=15∑n=1sinnxn
1
Expression 2: StartFraction, left parenthesis, "f" left parenthesis, negative tau "x" , right parenthesis plus 2 , right parenthesis Over 4 , EndFractionf−τx+24