Question 1033375
{{{(6a-3)x-(1-2a)}}}


{{{3(2a-1)x-(1-2a)}}}


small trick:
{{{3(2a-1)x-(-1)(-1+2a)}}}


{{{3(2a-1)+(2a-1)}}}



One more  steps:
{{{(2a-1)(3+1)}}}


{{{highlight((2a-1)*4)}}}