SUB, SUP Subscripts and superscripts. Also used for limits. SQRT , ROOT For square roots and other roots of an expression. TEXT Used to include a short piece of text within a math element, and often combined with SUB or SUP elements. These elements are used override the default rendering.
B renders the enclosed expression in an bold face.
T designates a term to be rendered in an upright font, while BT designates a term to be rendered in a bold upright font. The class attribute can be used to describe the kind of term, e.g. vector, tensor, or matrix. Relations Accents, arrows and pointers Delimiters Other symbols. The math tokeniser needs to be able to distinguish constants, variables, functions, operators, delimiters, and special symbols such as integrals, which can take limits and may be stretchy. The next step sets the size of the innermost expressions based on the size of available fonts.