Implicit differentiaion using the number "e" (lon-capa) Hello~ :3 this is my first time posting here, so I hope I didn't do anything wrong. I'm currently in Calculus 1, university level, and I have to enter all my answers using lon-capa (evil evil program). In lon-capa: *= multiplication sign exp= number e (exponents are instead put in parenthesis, as in my answer below) 1. The problem statement, all variables and given/known data Find dy/dx if the curve is defined by 10 x^2 e^(7 y) + 8 y^4 e^(5 x) = 19. 3. The attempt at a solution This is my lon-capa attempt: (10*x^2*7*exp(7*y)+20*x*exp(7*y)+8*y^4*5*exp(5*x))/(-32*y^3*exp(5*x)) This is a more reasonable-looking version: (10x^2*7e(7y)+20x*e(7y)+8y^4*5e(5x))/(-32y^3*e(5x)) I used both the product rule and implicit differentiation, but lon-capa keeps telling me my answer is wrong. I'm not sure if it's a mistake with the parenthesis or the answer itself, but I'd be grateful for any help/advice.