Scottfarrar

Hi

${\frac {\pi ^{2}}{6}}$,

$e^{i\pi }+1=0,\,\!\sum _{k=0}^{n-1}e^{2\pi ik/n}=0.\pi (x,a,d)={\frac {1}{\varphi (d)}}\int _{2}^{x}{\frac {1}{\ln t}}\,dt+O(x^{1/2+\epsilon })\quad {\mbox{ as }}\ x\to \infty$

$e^{\ln x^{2}}e^{2x}+\log {10^{\log 10^{2}}}+\log _{2}{x^{4}}$