$conf['savedir'] = '/app/www/public/data';
$\require{package}$ is used instead of usepackage
$\require{package}$
In the enclose package, phasors can be written as $\enclose{phasorangle}{a+b}$, producing $\require{enclose}\enclose{phasorangle}{a+b}$.
enclose
$\enclose{phasorangle}{a+b}$