User:''half-moon'' bubba/sandbox

$$ \lim_{n\rightarrow \infty} 4 n(\sin \frac {720} {2^n}) = \pi $$

date equation
$$ Np = \frac {W_p \times Np_(a \ge a_r)} {93193815736000 \times \pi^2 \times r^2}$$

$$ a_r =\frac {a_i} {2} + 7 $$

$$ \sum_{x=1}^{\infty } \frac{(-1)^{x+1}}{\alpha x} = \ln\sqrt[\alpha ]{2} $$