Which of the following expression does not represent SHM

$\mathrm{y}={\mathrm{Asin}}^2\mathrm{\omega t}$ will not be the solution for the equation $\frac{{\mathrm{d}}^2\mathrm{y}}{\mathrm{dt}}=-\mathrm{Ky}$.

So $\mathrm{y}={\mathrm{Asin}}^2\mathrm{\omega t}$ will not represent SHM.