Description:
------------
It seems that when I soustract something (float) it returns a wrong result.

Reproduce code:
---------------
<?php
echo 290.34 - (142.00 + 148.34);
?>
-5.68434188608E-14

<?php
echo 142.00 + 148.34;
?>
290.34

<?php
echo 290.34 - 290.34;
?>
0

Expected result:
----------------
<?php
echo 290.34 - (142.00 + 148.34);
?>
0

Actual result:
--------------
<?php
echo 290.34 - (142.00 + 148.34);
?>
-5.68434188608E-14