• \[\text{A2.} \quad \int 9 \sqrt{x} \, dx \] solution

  • \[\text{A1.} \quad \int \frac{1-3 \cos^3 x}{\cos^2 x}\] solution

  • \[\text{A2.} \quad \int (3 - 5^x)^{2} \, dx \] solution