6.
\(\displaystyle\int 4x\cdot\sin(3x)\,dx=?\)
7.
\(\displaystyle\int (2x-1)\cdot\cos(3x)\,dx=?\)
8.
\(\displaystyle\int (\log(2x))\,dx=?\)
9.
\(\displaystyle\int 2^x\cdot x^2\,dx=?\)
10.
\(\displaystyle\int 2x\cdot\ln(2x)\,dx=?\)
11.
\(\displaystyle\int \ln(x^{2x+4})\,dx=?\)
12.
\(\displaystyle\int (x^3+x^2)\cdot e^{2x}\,dx=?\)
13.
\(\displaystyle\int e^x\cdot\cos x\,dx=?\)
14.
\(\displaystyle\int x\cdot\operatorname{cosec}^2x\,dx=?\)
15.
\(\displaystyle\int e^x\cdot\sin x\,dx=?\)