<?php echo "<br><h4>Задание 2:</h4><br>;
$x=($a+$b)*$a;
if ($a==$b) $y=$x/($a*$b);
else $y=$x*$x*($a-$b);
if ($y<=2) $z=$x/$y;
else $z=$a*$b/($x*$y);
echo "<br>Ответ<br>";
echo "x=", $x, "<br>";
echo "y=", $y, "<br>";
echo "z=", $z, "<br>";
?>
PD9waHAgZWNobyAiPGJyPjxoND7Ql9Cw0LTQsNC90LjQtSAyOjwvaDQ+PGJyPjsKJHg9KCRhKyRiKSokYTsKaWYgKCRhPT0kYikgJHk9JHgvKCRhKiRiKTsKZWxzZSAkeT0keCokeCooJGEtJGIpOwppZiAoJHk8PTIpICR6PSR4LyR5OwplbHNlICR6PSRhKiRiLygkeCokeSk7CmVjaG8gIjxicj7QntGC0LLQtdGCPGJyPiI7CmVjaG8gIng9IiwgJHgsICI8YnI+IjsKZWNobyAieT0iLCAkeSwgIjxicj4iOwplY2hvICJ6PSIsICR6LCAiPGJyPiI7Cj8+