User:Cryptanalysis

$$\left \Vert \left ( \frac{dr}{du} \times \frac{dr}{dv} \right ) \right \|$$ $$\iint_{S} \,F \dot n\,dS$$ $$\int_{0}^{42} \, du = 42$$ $$\sum_{n=0}^p\frac{m^2\,n} {3^m\left(m\,3^n+n\,3^m\right)}$$