Sandbox

Seattle normal

S’està carregant el mapa…

---

---

<R>1:8</R> <M>1:8</M>

---

$\operatorname {erfc} (a)={\frac {2}{\sqrt {\pi }}}\int _{x}^{\infty }e^{-t^{2}}\,dt={\frac {e^{-x^{2}}}{x{\sqrt {\pi }}}}\sum _{n=0}^{\infty }(-1)^{n}{\frac {(2n)!}{n!(2x)^{2n}}}$

---

hola [1]

Error fetching PMID 15819889:
Error fetching PMID 20445623:
Error fetching PMID 15558047:
Error fetching PMID 20385591:
Error fetching PMID 16980575:
Error fetching PMID 15217358:
Error fetching PMID 15956978:
Error fetching PMID 18688268:
Error fetching PMID 18688269:

---

select
  *
from
  dual
;

x < 1:20

---

això és una prova tonta