Math test; Test started; It's about exponent and logarithm; When I saw something is little complicated; The question is quite tricky; The calculator didn't have good quality; When I tried to find non-base 10 or natural logarithms, it didn't show up; As I put in the function in graphing calculator, the result isn't shown; I have to complain to the teacher about the calculator is bad; Some of the question is totally nonsense; The class time was about to ran out