What is 12a-a-a-a simplified?

What are the basic concepts on points lines planes? What number is equal to 121 when it is squared? How many cubic meters is 8850 cubic centimeters? What is the reciprocal of 5 over 6? How long does it take to travel 62 miles? When was Arc'tan'gent created? How do you know which unit of a conversion factor must be the denominator? In the Christian scriptures what do the words 'I am' mean? What is 60 percent of 7100? What is 35 square meters converted into feet? What times 2 equals 540? How many significant digits are in the number 50.003010? How do you find the area ratio and perimeter of two corresponding sides of two similar polygon? What are all the factor pairs up to 60? A procedure for testing a hypothesis is what? How clap came to its meaning? How many square feet is 355 square meters? Why do you take 100 for percentage calculation? What is 2 divied by 15? Can the law of cosines be applied to right and non-right triangles?