Sandlåda

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Info om hur man skriver matte: http://en.wikipedia.org/wiki/Help:Formula#Pros_of_TeX

The quadratic formula is -b \pm \sqrt{b^2 - 4ac} \over 2a


PQ-formeln är: x = -{p \over 2} \pm \sqrt{({p \over 2})^2 -q}

i\hbar\frac{\partial\psi}{\partial t}=-\frac{\hbar^2}{2m}\nabla^2\psi + V\left( \bold r \right)\psi