Question 169904
Simplify
t^4-1 over t^3+t^2+t+1
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{{{(t^4-1)/(t^3+t^2+t+1)}}}
= {{{(t^2+1)*(t^2-1)/((t+1)*(t^2+1))}}}
Cancel the (t^2+1)
= {{{(t^2-1)/(t+1)}}}
= {{{(t-1)*(t+1)/(t+1)}}}
Cancel (t+1)
= t-1