User:Calculus 248/sandbox

behold the sandbox

line of h (not infinite): hh h h h h h h h hh h h h h h h h h h

this is infinite: $$\infty$$ or $$\sum_{k=1}^\infty k = \infty(\infty+1)\div 2= \infty terminal$$

$$\int$$ $e^{-x^{2}}|undefined$ $$dx={\sqrt{\pi}\over 2}erf(x)+C$$

$h/2$