formula

$\bigg|\int_0^t(X_s^{(\theta)})^{1/3}d\langle W,A^{(\theta)}\rangle _s\bigg|\leq \bigg(\int_0^t (X_s^{(\theta)})^{2/3}d\langle A^{(\theta)}\rangle_s\bigg)^{1/2}\bigg(\int_0^t1ds\bigg)^{1/2}=0$