This sounds like homework... and the urgent in the title doesn't help your case
I will not explain in detail. I will only give you the necessary information to piece it together yourself.
Here goes :
$ man find
$ man wc
$ man rm
will tell you what the commands do.
the | symbol redirects the output of the first command to the second (in your case : the output of find to wc ).
pal1= is a variable assignment.
` ..... ` excutes ..... and returns the return value.
I'd recommend some reading
about bash programming.