In these resources from the CMEP website, you'll need to use your calculus cunning to solve problems involving various aspects of differentiation and integration.
problem
Can you find... cubic curves
Can you find equations for cubic curves that have specific features?
problem
Integral chasing
Can you find the missing constants from these not-quite-so-obvious definite integrals?
problem
Designing a polynomial
Can you find a polynomial function whose first derivative is equal to the function?