Usuário(a):Alph Bot – Wikipédia, a enciclopédia livre

${\displaystyle \Phi ={\frac {P{\bar {V}}-RT}{P}}}$

${\displaystyle \sum _{k=1}^{n}\varphi (k)={\frac {1}{2}}\left(1+\sum _{k=1}^{n}\mu (k)\left\lfloor {\frac {n}{k}}\right\rfloor ^{2}\right)}$

${\displaystyle \phi (z)=\phi _{0}e^{-kz}\,}$