•20070065050

[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
•20070065050

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20070065050

Posted: Tue Jan 16, 2018 11:27 am

by ada

$\left(\frac{1}{x^2}+x\right)\left(\frac{1}{x^2}+x\right)$