The following types of mathematical expressions occur in more advanced
subjects.

To create a matrix, click on an icon corresponding to the
dimensions desired (2×2, 2×3, etc.), then fill in the cells with
appropriate values.

For topics involving set notation, there will appear icons for each of
the special symbols required, such as curly braces, "belongs to,"
"such that," the real numbers, the integers, and so forth.

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