Assignment $2$

Create a parse tree for each expression below. Define the tokens and the regular expressions for each token used in the parse tree. You can assume white space doesn't exist.

$4\mathrm{.}3+8=12\mathrm{.}3$

a $^2+$ b$^2=$c$^2$

boolean variable $==$ true

$4*5+100/10=45-15$

$4*$variable$1=5\mathrm{.}67*$variable$\_2$

I have attached the first example, this is how I want. Thank You!