Answer
$3t^2 + \frac{3t}{7} - \frac{11}{7}$
Work Step by Step
$(21t^5+3t^4-11t^3) \div 7t^3$ = $\frac{21t^5}{ 7t^3} + \frac{3t^4}{ 7t^3} - \frac{11t^3}{ 7t^3} $ = $3t^2 + \frac{3t}{7} - \frac{11}{7}$
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