This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)


Updated In 6 Graphic
puts terms in a sum over a common denominator, and cancels factors in the result.
  • Together makes a sum of terms into a single rational function.
  • The denominator of the result of Together is typically the lowest common multiple of the denominators of each of the terms in the sum.
  • Together avoids expanding out denominators unless it is necessary.
  • Together[expr, Trig->True] treats trigonometric functions as rational functions of exponentials, and manipulates them accordingly.
  • Together automatically threads over lists, as well as equations, inequalities and logic functions.
Combine terms over a common denominator:
Click for copyable input
Cancel common factors between the numerator and the denominator:
Click for copyable input
New in 1 | Last modified in 6