Find from first principle ,the diffential coefficient of sin(2x+5)

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Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

Empty box + box + empty box fill in the box is equal to 30 how