Anyone please help me

What is the simplified form of 7 √x • 7 √x • 7 √x • 7 √x?

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12