Product operator, P

Product operator, Q

$I_y\otimes E_S\otimes E_K$

$E_I\otimes E_S\otimes K_y$

$E_I\otimes S_y^2\otimes E_K$

$E_I\otimes S_y^2\otimes E_K$

$I_y\otimes S_z^2\otimes E_K$

$E_I\otimes S_z^2\otimes K_y$

$E_I\otimes S_z^2\otimes K_y^2$

$I_y^2\otimes S_z^2\otimes E_K$

$I_x\left(S_x^2-S_y^2\right)\left(K_x^2-K_y^2\right)$

$\left(I_x^2-I_y^2\right)\left(S_x^2-S_y^2\right)K_x$

$I_y^2{\left[S_x,S_z\right]}_{+}{K}_z^2$

$I_z^2{\left[S_x,S_z\right]}_{+}{K}_y^2$

${\left[I_x,I_z\right]}_{+}{S}_y{\left[K_x,K_y\right]}_{+}$

${\left[I_x,I_y\right]}_{+}{S}_y{\left[K_x,K_z\right]}_{+}$

$\left(I_x^2-I_y^2\right){\left[S_x,S_z\right]}_{+}{\left[K_x,K_z\right]}_{+}$

${\left[I_x,I_z\right]}_{+}{\left[S_x,S_z\right]}_{+}\left(K_x^2-K_y^2\right)$