Will give brainliest to whoever figures this out :(

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Match the vocabulary to the proper definition. in probability, two events in which 1. conditional probability the outcome of one event is independent of the outcome of a second event. 2. dependent events in probability, two events in which the outcome of one event is dependent on the outcome of a second event. the probability of an event in which the outcome of the event is conditional on the outcome of one or more different events. 3. independent events

Solve for x where 0 equation: cot^2x+2cotx+1=0