Simplify:
$- 4 x (5 x^{2} - 12) + 7 (x + 5)$

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Solution

Given that:
$- 4 x (5 x^{2} - 12) + 7 (x + 5)$

On simplifying, we get
$= - 20 x^{3} + 48 x + 7 x + 35$
$= - 20 x^{3} + 45 x + 35.$

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