1. int(4x^3-6x^2-4x+3)dx = 4x^4/4 - 6x^3/3 - 4x^2/2 + 3x + C = x^4-2x^3-2x^2+3x+C
int (x^4-x*e^x+6)/x dx = int (x^3-e^x+6/x) dx = x^4/4 - e^x + 6*ln(x) + C
2. int ot -1 do 0 (x^3+2x)dx = (x^4/4 + 2x^2/2) | ot -1 do 0 = (-1)^4/4 - 0 + 2*(-1)^2/2 - 0 = 1/4+1 = 5/4
int ot 4 do 5 (4-x)^3 dx = int ot 4 do 5 (64-48x+12x^2-x^3) dx = (64x - 48x^2/2 + 12x^3/3 - x^4/4) ot 4 do 5 = (64x - 24x^2 + 4x^3 - x^4/4) ot 4 do 5 = 64*5 - 64*4 - 24*5^2 + 24*4^2 + 4*5^3 - 4*4^3 - 5^4/4 + 4^4/4 = 64 - 600 + 384 + 500 - 256 - 625/4 + 64 = 156 - 625/4 = 624/4-625/4 = -1/4