What is the value of $p(-12)+p(-5)$?

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The function

p

is defined by

p (x) = a ((x + 6)^{2} - b) ((x + 6)^{2} - c)

, where

a

b

, and

c

are constants. In the xy-plane, the graph of

y = p (x)

passes through the points

(- 7, 24)

and

(0, 899)

What is the value of

p (- 12) + p (- 5)

923