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Built-in Mathematica Symbol

ExpandDenominator

ExpandDenominator[expr]
expands out products and powers that appear as denominators in expr.

ExpandDenominator automatically threads over lists, as well as equations, inequalities and logic functions.

Expand the denominator of a fraction:

Expand the denominator in each term:

Expand the denominator of a fraction:

Expand the denominator in each term:

Expand the denominator of a rational function:

ExpandDenominator threads over sums:

ExpandDenominator threads over Boolean combinations of equations and inequalities:

Expand the denominator over the integers modulo 3:

Expand the denominator using expansion formulas for trigonometric functions:

ExpandDenominator leaves the numerator unexpanded:

ExpandNumerator expands the numerator, leaving the denominator unexpanded:

Expand expands the numerator and expands the fraction into a sum of fractions:

ExpandAll expands the numerator, the denominator, and the fraction:

Use Factor, Numerator and Denominator to factor the denominator back: