Question 352747
{{{  3/a^2+a * 2a+2/6 =  3/a^2 + 2a^2 + 2/6 = (6/6)(3/a^2) + (6a^2/6a^2)(2a^2) + (a^2/a^2)(2/6) =  (18/6a^2) + (12a^4/6a^2) + (2a^2/6a^2) = (18 + 12a^4 + 2a^2)/6a^2  =  2(9 + 6a^4 + a^2)/(2*3a^2)  = (9 + 6a^4 + a^2)/(3a^2)      }}}