I need to know what is 8x^2-10x-12

Plz which expression is equivalent to the expression below?

Mary works for a company that ships packages and must measure the size of each box that needs to be shipped. mary measures a box and finds the length is 7 inches, the width is 14 inches, and the height is 15 inches. what is the volume of the box? [type your answer as a number.]

Write the expression as a constant , a single trigonometric function, or a power of a trigonometric function. sin x cos x/ tan x