m i n { x , y } = x y exp ( − 1 2 | log y x | ) {\displaystyle min\{x,y\}={\sqrt {xy}}\exp(-{\frac {1}{2}}|\log {\frac {y}{x}}|)}
s i = s o m e t h i n g i a n o t h e r t h i n g {\displaystyle s_{i}={\frac {something_{i}}{anotherthing}}}
s s s = ∑ i = 1 n s i {\displaystyle sss=\sum _{i=1}^{n}s_{i}}
or
s s s = ∑ i ∈ A s i {\displaystyle sss=\sum _{i\in A}s_{i}}
