Question 396150
Add.  Simplify if possible.
{{{(4t)/(t^2-1)+(t)/(t-1)}}}


t^2 - 1 = (t + 1)(t - 1) by FOIL (First Outer Inner Last) middle terms cancel out in this case
{{{(4t)/(t^2-1)+(t)(t+1)/(t-1)(t+1)}}}
needed common denominator so multiplied top and bottom on second fraction by t+1
{{{(4t+t^2+t)/(t^2-1)}}}
{{{(t^2+5t)/(t^2-1)}}}