How to Simlify( product of sinusoidal odd hormonics)?

[Surendra]

We can simplify the sum of sinusoidal by Fourier series or Transform. Is there any way to simplify the product of sinusoidal odd harmonics as below?.
Simplify(a1.SIN(2*P*x/3) * a2.SIN(2*P*x/5) * a3.SIN(2*P*x/7) *-------).
Thanks and regards
surendra