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→Arithmetic without using a abacus
Now that we have some idea of how to work with LuaTeX, let's look at some examples.
= Arithmetic without using a an abacus =
Doing simple arithmetic in TeX can be extremely difficult, as illustrated by the division macro in the introduction. With Lua, simple arithmetic becomes trivial. For example, if you want a macro to find the cosine of an angle (in degrees), you can write
