Math/basic

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To tell TeX that an expression needs to be typeset using conventions for math, type the expression in $...$. For examples $x$ gives , while $2$ gives . Notice that the x is in italic while the 2 is upright. This is the usual mathematic convention.

More general expressions can be input in the natural manner. For example $x+y$ gives . Notice that TeX took care of the spacing around +. Mathematicians use a lot of symbols that are not avialable on the keyboard. TeX (and ConTeXt) provide macros to input them. For example $x \times y$ gives . In ConTeXt, you can see the list of all math macros by \showmathcharacters

Here is the first page of this list

Thus to type the greek character α you can say $\alpha$ which gives . If you have a utf enabled keyboard, you can also type the α directly and ConTeXt will correctly interpret it. For example,

\enableregime[utf]

Here is some Greek math $α^2 + β^2 = γ^2$

subscript and superscipt

TeX uses ^ and _ to denote superscipts and subscipts. It is perhaps easiest to explain this by means of some examples. is written as $x_{10}^{15}$ or $x^{15}_{10}$. The order in which _ and ^ are given does not matter. One can also type complicated expressions like as $a_{b_{c_{d_{e}}}}$.