If x^2 +3y^3 = 12, find dy/dx and evaluate (-2, -3)

Josephine has a great garden with and area of 2x2 + x - 6 square feet

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

Can someone me with this? i’m not sure what to put for my equations.