X dx 1 2x

X dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2x
X dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2x
X dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2x
X dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2x
X dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2xX dx 1 2x