Latex Commands - Exponents and Subscripts

Symbol	Command
$2^{2}$	2^2
$\textstyle a_{i}$	a_i
$\textstyle 2^{23}$	2^{23}
$\textstyle n_{i-1}$	n_{i-1}
$a_{3}^{i+1}$	a^{i+1}_3
$x^{3^{2}}$	x^{3^2}
$2^{a_{i}}$	2^{a_i}
$2_{i}^{a}$	2^a_i