The height of a soccer ball kicked by Javier "Chicharito" Hernández %0 is given by
$d(t) = %1$ meters,
where $t$ is time in seconds after he kicks it.

$d(t) = {}$
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$d(t+h) = {}$
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Do not expand yet.
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$d(t+h) - d(t) = {}$
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You need not simplify yet.
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$d(t+h) - d(t) = {}$
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Expanded and simplified
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$\displaystyle \frac{d(t+h) - d(t)}{h} = {}$
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$d'(t) = {}$
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Velocity of the ball after %2 seconds ${} = {}$
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%2 seconds after he kicks it, the ball has a height of BOXm and is moving RADIO at a speed of BOXm/sec
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RANDOMIZE