\begin{tikzpicture}[sketch] \draw[->](-4,0)--(4.25,0); \draw[->](0,-2)--(0,2); \fill[awesome](-2,0) circle(0.1)node[above]{$-E_\text{p}$}; \fill[awesome](2,0) circle(0.1)node[below]{$+E_\text{p}$}; \draw[dodgerblue,postaction={on each segment={mid arrow=dodgerblue}}](-4,0)--(-2.4,0); \draw[dodgerblue](-2.40,0) arc(-180:-0:0.4); \draw[dodgerblue,postaction={on each segment={mid arrow=dodgerblue}}](-1.6,0)--(0,0); \draw[dodgerblue,postaction={on each segment={mid arrow=dodgerblue}}](0,0)--(1.6,0); \draw[dodgerblue] (1.60,0) arc(180:0:0.4); \draw[dodgerblue,postaction={on each segment={mid arrow=dodgerblue}}](2.4,0)--(4,0); %\draw[dodgerblue,postaction={on each segment={mid arrow=dodgerblue}}, out=220, in=290](170:4) to (-4,0); \draw[dodgerblue,dotted,postaction={on each segment={mid arrow=dodgerblue}}](170:3.75) arc(135:180:0.9); \draw[dodgerblue,dotted,postaction={on each segment={mid arrow=dodgerblue}}](-170:3.75) arc(-135:-180:0.9); \draw[dodgerblue,dotted,postaction={on each segment={mid arrow=dodgerblue}}](4,0) arc(0:45:0.9)node[above]{$x^0y^0$}; \draw(4.7,0) node{$=$}; \end{tikzpicture} %2. Graph: \begin{tikzpicture}[sketch] \draw[->](-4,0)--(4.25,0); \draw[->](0,-2)--(0,2); \fill[awesome](-2,0.5) circle(0.1)node[above]{$-E_\text{p}+i \varepsilon$}; \fill[awesome](2,-0.5) circle(0.1)node[below]{$E_\text{p}-i\varepsilon$}; \draw[dodgerblue,postaction={on each segment={mid arrow=dodgerblue}}](-4,0)--(-2,0); %\draw[dodgerblue](-2.25,0) arc(-180:-0:0.25); \draw[dodgerblue,postaction={on each segment={mid arrow=dodgerblue}}](-2,0)--(0,0); \draw[dodgerblue,postaction={on each segment={mid arrow=dodgerblue}}](0,0)--(2,0); %\draw[dodgerblue] (1.75,0) arc(180:0:0.25); \draw[dodgerblue,postaction={on each segment={mid arrow=dodgerblue}}](2,0)--(4,0); %\draw[dodgerblue,postaction={on each segment={mid arrow=dodgerblue}}, out=220, in=290](170:4) to (-4,0); \draw[dodgerblue,dotted,postaction={on each segment={mid arrow=dodgerblue}}](170:3.75) arc(135:180:0.9); \draw[dodgerblue,dotted,postaction={on each segment={mid arrow=dodgerblue}}](-170:3.75) arc(-135:-180:0.9); \draw[dodgerblue,dotted,postaction={on each segment={mid arrow=dodgerblue}}](4,0) arc(0:45:0.9)node[above]{$x^0y^0$}; \end{tikzpicture}