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

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