Det[m] gives the determinant of the square matrix m.

MapAt[f, expr, n] applies f to the element at position n in expr. If n is negative, the position is counted from the end. MapAt[f, expr, {i, j, ...}] applies f to the part of ...

ToBoxes[expr] generates boxes corresponding to the printed form of expr in StandardForm. ToBoxes[expr, form] gives the boxes corresponding to output in the specified form.

CanberraDistance[u, v] gives the Canberra distance between vectors u and v.

LeafCount[expr] gives the total number of indivisible subexpressions in expr.

LogicalExpand[expr] expands out logical combinations of equations, inequalities, and other functions.

MeanDeviation[list] gives the mean absolute deviation from the mean of the elements in list.

Converting between strings and lists of characters. This gives a list of the characters in the string. You can apply standard list manipulation operations to this list.

MathLink provides a mechanism through which programs can interact with Mathematica. Some typical uses of MathLink. MathLink provides a general interface for external programs ...

The replacement operator /. allows you to apply transformation rules to a specific expression. Often, however, you want to have transformation rules automatically applied ...