$$( - 2 p ^ { 2 } + 10 p - 14 ) + ( - 9 p ^ { 2 } + 4 p )$$
$-11p^{2}+14p-14$
$$-11p^{2}+10p-14+4p$$
$$-11p^{2}+14p-14$$
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$14-22p$
$$\frac{\mathrm{d}}{\mathrm{d}p}(-11p^{2}+10p-14+4p)$$
$$\frac{\mathrm{d}}{\mathrm{d}p}(-11p^{2}+14p-14)$$
$$2\left(-11\right)p^{2-1}+14p^{1-1}$$
$$-22p^{2-1}+14p^{1-1}$$
$$-22p^{1}+14p^{1-1}$$
$$-22p^{1}+14p^{0}$$
$$-22p+14p^{0}$$
$$-22p+14\times 1$$
$$-22p+14$$
