"Why bother?" - presumably because that was the assignment ;)

Anon Monk, can we see your efforts before we try and help? That said, it sounds like you need to match an ampersand that has a whitespace character before and after it...

map{$a=1-$_/10;map{$d=$a;$e=$b=$_/20-2;map{($d,$e)=(2*$d*$e+$a,$e**2
-$d**2+$b);$c=$d**2+$e**2>4?$d=8:_}1..50;print$c}0..59;print$/}0..20
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