If the function f is defined by f(x + 2) = 2x\(^2\) + 7x - 5, find f(-1)
Simplify \(\frac{1}{p}\) - \(\frac{1}{q}\) \(\div\) \(\frac{p}{q}\) - \(\frac{q}{p}\)
Solve the inequality y2 - 3y > 18
