[phpBB Debug] PHP Warning: in file [ROOT]/phpbb/session.php on line 580: sizeof(): Parameter must be an array or an object that implements Countable
[phpBB Debug] PHP Warning: in file [ROOT]/phpbb/session.php on line 636: sizeof(): Parameter must be an array or an object that implements Countable
•20190090060
Page 1 of 1

20190090060

Posted: Thu Jan 11, 2018 4:36 pm
by ada
$(4x-1)^2-(3x-5)^2$