TrigToExp[expr] converts trigonometric functions in expr to exponentials.

Which[test_1, value_1, test_2, value_2, ...] evaluates each of the test_i in turn, returning the value of the value_i corresponding to the first one that yields True.

WindowMargins is a notebook option that specifies what margins to leave around the window that is used to display the notebook on the screen.

$Assumptions is the default setting for the Assumptions option used in such functions as Simplify, Refine, and Integrate.

$IterationLimit gives the maximum length of evaluation chain used in trying to evaluate any expression.

$MaxExtraPrecision gives the maximum number of extra digits of precision to be used in functions such as N.

In many computations you are concerned only with the final result of evaluating the expression given as input. But sometimes you also want to collect expressions that were ...

Functions for constructing matrices. This generates a 2×2 matrix whose i,j^th entry is a[i,j]. Here is another way to produce the same matrix.

Following are two examples of nonlinear systems of ODEs that can be solved symbolically using DSolve. The first three equations in this system of four nonlinear ODEs can be ...

Much of what Mathematica does revolves around manipulating structured expressions. But you can also use Mathematica as a system for handling unstructured strings of text. ...