how do i find the sum or difference and write my answer as a simplified improper fraction of 5/6-1/2

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.)

Tan198=asin164=? how to solve this? ?

Add. express your answer in simplest form. 12 9/10+2 2/3 = i need u guys to me find the answer to this question