Question 1144161
{{{ (t^2-1)/(t^2-4) }}} + {{{(9t+9)/(4t+12)}}}*{{{(2-t)/(t^2+2t-3)}}}
= {{{ (t^2-1)/(t^2-4) }}} + {{{9*(t+1)/(4*(t+3))}}}*{{{(2-t)/((t+3)*(t-1))}}}
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If you sub t = 5, you find that the book's answer is wrong.