\LL\left( \begin{tikzpicture}[baseline=.5cm, rounded corners=2mm]
    \draw(-.5,-.5)-- (.5,.5) -- (.1,.9);
    \draw (-.1,1.1)--(-.5,1.5);
    \draw (-.1,.1) -- (-.5,.5)--(.5,1.5);
    \draw (.1,-.1) -- (.5,-.5);
\end{tikzpicture}\right)
- \LL\left(
\begin{tikzpicture}[baseline=.5cm,rounded corners=2mm,xscale=-1]
    \draw(-.5,-.5)-- (.5,.5)--(-.5,1.5);
    \draw (-.1,.1) -- (-.5,.5)--(-.1,.9);
    \draw (.1,-.1) -- (.5,-.5);
    \draw (.1,1.1) -- (.5,1.5);
\end{tikzpicture}\right)
= z
\left( \LL\left(
\begin{tikzpicture}[baseline=.5cm,rounded corners=2mm]
    \draw (-.5,-.5) -- (-.5,.5)-- (.5,1.5);
    \draw (-.1,1.1) -- (-.5,1.5);
    \draw (.1,.9) -- (.5,.5)--(.5,-.5);
\end{tikzpicture}\right)
- \LL\left(
\begin{tikzpicture}[baseline=.5cm,rounded corners=2mm]
    \draw (4.5,1.5) -- (3.5,.5) .. controls (4,0) .. (4.5,.5) -- (4.1,.9);
    \draw (3.5,-.5) .. controls (4,0) .. (4.5,-.5);
    \draw (3.9,1.1) --(3.5,1.5);
\end{tikzpicture}
\right)\right)