∫(4x^(1/3) - 6x^(1/2)) dx = 4∫x^(1/3) dx - 6∫x^(1/2) dx
= 4(x^(4/3)/(4/3)) - 6(x^(3/2)/(3/2)) + C
= 3x^(4/3) - 4x^(3/2) + C