Together

Together[e] attempts to put the terms in e under the same denominator.

Attributes[Together] := {Listable, Protected}

Simple examples

In[1]:= Together[(1)/(2) + (3)/(a)]
Out[1]= (6 + a)/(2*a)

In[2]:= Together[((1)/(2) + (3)/(a))^c]
Out[2]= ((1)/(2) + (3)/(a))^c

In[3]:= Together[((1)/(2) + (3)/(a))^2]
Out[3]= ((6 + a)^2)/(4*a^2)