Find the equation of the curve y = f(x) that passes through the specified point for each of the following gradient functions:

a. dy/dx = 2x – 3; (2, 4)

b. dy/dx = 4 + 3x³ (4, -2)

c. dy/dx = 5x – 6; (-2, 4)

d. f'(x) = x² + 1; (-3, -3)

e. f'(x) = (x + 1)(x – 2); (6, -2)

f. f'(x) = (2x + 1)²; (1, -1)