Find the integral $\int\left(x^2-2x+1\right)e^{2x}dx$

Find the integral

$\int\frac{1}{e^{2x}-3e^x}dx$

Find the integral

$\int\frac{1}{1+e^{-2x}}dx$

Find the integral

$\int x^2e^{2x+1}dx$

Find the integral

$\int x^2e^xdx$

Find the integral

$\int16xe^{4x}dx$

Find the integral

$\int xe^{3x}dx$

Find the integral

$\int xe^{2x}dx$