$12 Font sizes$
${displaystyle int f^{-1}(x-x_a)\,dx}$ {displaystyle int f^{-1}(x-x_a)\,dx}
${ extstyle int f^{-1}(x-x_a)\,dx}$ { extstyle int f^{-1}(x-x_a)\,dx}
${scriptstyle int f^{-1}(x-x_a)\,dx}$ {scriptstyle int f^{-1}(x-x_a)\,dx}
${scriptscriptstyle int f^{-1}(x-x_a)\,dx}$ {scriptscriptstyle int f^{-1}(x-x_a)\,dx}
iny$= iny{smallest}$
scriptsize$=scriptsize{very small}$
small$=small{small}$
ormalsize$= ormalsize{normal}$
large$=large{large}$
Large$=Large{Large}$
LARGE$=LARGE{LARGE}$
huge$=huge{huge}$
Huge$=Huge{Huge}$