Befehl Symbol
$$ \bigprod_{i=k}^{n}~i $$  \bigprod_{i=k}^{n}~i
$$ \bigsum_{i=k}^{n}~\left(2i+1\right) $$  \bigsum_{i=k}^{n}~\left(2i+1\right)
$$ a~\pm~b $$  a\pm~b
$$ x~\div~y $$  x~\div~y
$$ \infty $$  \infty
$$ x~\gt~y $$  x~\gt~y
$$ x~\ge~y $$  x~\ge~y
$$ x~\lt~y $$  x~\lt~y
$$ x~\le~y $$  x~\le~y
$$ x~\eq~y $$  x~\eq~y
$$ x~\neq~y $$  x~\neq~y