1.1 ∫(1-3x^2)*dx
1.2 ∫(e^x-2cosx)*dx
1.3 ∫(cosx+sinx)*dx
2.1 ∫(x-2)^3*dx
2.2 ∫(3x)/(x^2+1)dx
2.3 ∫(2x^2)/(x^3-3)

1.1  х- х^3 + C
 1.2 e^x - 2sinx+C
  1.3 sinx-cosx+c
  2.1( (x-2)^4)/4+c
  2.2 3/2*ln(x^2 + 1) + C
  2.3 2/3*ln|x^3-3| +C