Simplify 2xy to the second power over 5x to the third power y to the third power multiplied by 10 x to the negative second power y to the seventh power over 4 x to the negative fourth power y

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Me with this one question, and i'll upvote the brainliest answer

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?