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Together

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Together[expr]
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:
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Out[1]=
 
Cancel common factors between the numerator and the denominator:
In[1]:=
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Out[1]=
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