User:Tikai/sandbox

$$t_1=\frac{2\rho_0}{\lambda}\left(\frac{\partial\psi}{\partial I_1} +\frac{\partial\psi}{\partial I_2}\frac{1}{\lambda} \right)* \left(\lambda^2-\frac{1}{\lambda^2}\right)$$

$$t_1=\frac{2\rho_0}{\lambda}\left(\frac{\partial\psi}{\partial I_1} +\frac{\partial\psi}{\partial I_2} \right)* \left(\lambda^2-\frac{1}{\lambda}\right)$$

$$t_1=\frac{2\rho_0}{\lambda}\left(\frac{\partial\psi}{\partial I_1} +\frac{\partial\psi}{\partial I_2}\lambda^2 \right)* \left(\lambda^2-\frac{1}{\lambda^4}\right)$$