11.
\(\displaystyle\int \samefrac{2x+3}{x^2+3x}\,dx=?\)
12.
\(\displaystyle\int \sin^2x\cdot\sin(2x)\,dx=?\)
13.
\(\displaystyle\int 8\cdot\cos^3x\cdot\sin x\,dx=?\)
14.
\(\displaystyle\int (2x^3+3)^3\cdot x^2\,dx=?\)
15.
\(\displaystyle\int \samefrac x{2x^2+1}\,dx=?\)
16.
\(\displaystyle\int (x^2-7)^9\cdot\samefrac x2\,dx=?\)
17.
\(\displaystyle\int g^2(x)\cdot g'(x)\,dx=?\)
18.
\(\displaystyle\int \sin(2x)\,dx=?\)
19.
\(\displaystyle\int \cos^2(4x)\,dx-\displaystyle\int \sin^2(4x)\,dx=?\)
20.
\(\displaystyle\int\samefrac{dx}{x\cdot\ln x}=?\)
21.
\(\displaystyle\int \samefrac{e^{\ln x}}x\,dx=?\)
22.
\(\displaystyle\int \samefrac4{16x^2-8x+1}\,dx=?\)
23.
\(\displaystyle\int \samefrac{x-1}{(x+1)^3}\,dx=?\)
24.
\(\displaystyle\int e^{4x^2-4x}\cdot(2x-1)\,dx=?\)