How would I make a truth tree step by step for the following argument?

$($x$)($y$)($z$)($B$($x$)$B$($y$)$B$($z$)($x$=$z $)($y$=$z$)($x$)($y$)($z$)$w$($B$($x$)$B$($y$)$B$($z$)$ B$($w$)->($x$=$y $$x$=$z $($x$=$w$)$y$=$z$)($y$=$w$)($z$=$w$)$