Factor applies only to the top level in an expression. You may have to apply Factor again to reach other levels. The exponents of variables need not be positive integers.
Factor can deal with exponents that are linear combinations of symbolic expressions.
When given a rational expression, Factor effectively first calls Together , then factors numerator and denominator. Here is the InstantCalculator for the Factor function. Enter the parameters for your calculation and click Calculate to see the result. Directly You can paste a template for this command via the Text Input button on the Factor Function Controller. Here are a few factored polynomials.