Answer
$ 80t^{13}$
Work Step by Step
We used: $a^n a^m = a^{n+m}$
$-8t^3 \times 2t^6 \times -5t^4 = -8 \times 2 \times -5 \times t^{3+6+4} = 80t^{13}$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.