formula -- payoff(s) / challenge(s) / game(s) / math(s) / plan(s)

* _ .. -- @ media / idea(s) / change(s) / theme(s) ? [:/] _

latex command(s)

display: \left( \sum_{k=1}^n a_k b_k \right)^{\!\!2} etc. (using jsMath)
$$ \left( \sum_{k=1}^n a_k b_k \right)^{\!\!2} \le \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right) $$

adventure(s) / resource(s)

* - play / social(s) / machine(s) / method(s) / cycle(s) # ! @ Æ