1) F(x) = 9x³/3 - 1/3*Cos3x + C = 3x³ - 1/3*Cos3x + C
2) F(x) = 12x^4/4 -1/4*Sin4x +C = 3x^4 - 1/4*Sin4x + C
3) F(x) = 1/2*Sin2x -1/2*2√(2x -3) + 2x + C = 1/2*Sin2x -√(2x -3) + 2x + C
4) F(x) = -1/2*2√(5 - 2x) -1/5*Cos5x + x + C =
= -√(5 - 2x) -1/5*Cos5x +x + C