4) $$\frac{14p^2}{7p+3} - 2p = \frac{14p^2 - 2p(7p+3)}{7p+3} = \frac{14p^2 - 14p^2 - 6p}{7p+3} = \frac{-6p}{7p+3}$$
Ответ: $$\frac{-6p}{7p+3}$$