# User:Cryptanalysis

${\displaystyle \left\Vert \left({\frac {dr}{du}}\times {\frac {dr}{dv}}\right)\right\|}$ ${\displaystyle \iint _{S}\,F{\dot {n}}\,dS}$ ${\displaystyle \int _{0}^{42}\,du=42}$ ${\displaystyle \sum _{n=0}^{p}{\frac {m^{2}\,n}{3^{m}\left(m\,3^{n}+n\,3^{m}\right)}}}$