• Together[expr] puts terms in a sum over a common denominator, and cancels factors in the result.
• Example: Together[1/x + 1/(1-x)]
• 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.
is effectively the inverse of Apart
• Together[expr, Modulus->p] generates a result modulo p.
• Together[expr, Extension->Automatic] allows operations to be performed on algebraic numbers in expr.
• Together[expr, Trig -> True] treats trigonometric functions as rational functions of exponentials, and manipulates them accordingly.
• New in Version 1; modified in 3.