Debug equations

src/14_doping_and_devices_solutions.md

@@ -102,8 +102,8 @@ $$-\frac{\hbar^2}{2m_h^{\ast}} \nabla^2 \Psi_h = (E_v-E_h)\Psi_h $$
 
 ### Subquestion 3
 
-$$E_e = E_c + \frac{\hbar^2}{2m_e^{\ast}} ((\frac{\pi n}{L})^2+k_x^2+k_y^2)}$$
-$$E_h = E_v - \frac{\hbar^2}{2m_h^{\ast}} ((\frac{\pi n}{L})^2+k_x^2+k_y^2)}$$
+$$E_e = E_c + \frac{\hbar^2}{2m_e^{\ast}} ((\frac{\pi n}{L})^2+k_x^2+k_y^2)$$
+$$E_h = E_v - \frac{\hbar^2}{2m_h^{\ast}} ((\frac{\pi n}{L})^2+k_x^2+k_y^2)$$
 
 ### Subquestion 4
 This is a 2D electron/hole gas. Apply 2D density of states (constant).