some text that is not formated
a 2 {\displaystyle a^{2}}
5 {\displaystyle {\sqrt {5}}}
∑ n = 0 ∞ a n n ! {\displaystyle \sum _{n=0}^{\infty }{\frac {a^{n}}{n!}}}
lim x → ∞ f ( x ) = 0 {\displaystyle \lim _{x\to \infty }f(x)=0}
x = a 0 + 1 a 1 + 1 a 2 + 1 a 3 + a 4 {\displaystyle x=a_{0}+{\frac {1}{a_{1}+{\frac {1}{a_{2}+{\frac {1}{a_{3}+a_{4}}}}}}}}
