Equations in LaTeX!

1) Latex Code for

\begin{equation}
E(\theta,\phi) = -j\frac{Z_{0}}{2\lambda}\frac{e^{-jkr}}{r}\sum\limits_{m=0}^{M} le_{m}(\theta)i_{m}a_{m}(\theta,\phi)
\end{equation}


2) Latex Code for 

\begin{equation}
\min_{x}{\frac{1}{2}x^{T}Hx+c^{T}x+b}
\end{equation}