Expression 1: sine left parenthesis, StartFraction, pi "x" Over 2 , EndFraction , right parenthesis sine left parenthesis, StartFraction, pi "x" Over 3 , EndFraction , right parenthesis sine left parenthesis, StartFraction, pi "x" Over 5 , EndFraction , right parenthesis sine left parenthesis, StartFraction, pi "x" Over 7 , EndFraction , right parenthesis sine left parenthesis, StartFraction, pi "x" Over 11 , EndFraction , right parenthesissinπx2sinπx3sinπx5sinπx7sinπx11