deletions | additions       diff --git a/untitled.tex b/untitled.tex  index e9f26ab..821163c 100644  --- a/untitled.tex  +++ b/untitled.tex 
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\int_0^\pi sin(x)dx =2 & \int_0^\pi xcos(x)dx = -2 \\  \int_0^\infty e^{-x} dx =1 & \int_0^\infty -xe^{-x} dx = -1 \\  \int_0^\infty x^{z-1}e^{-x} dx= \Gamma(z) & \int_0^\infty x^{z-1}e^{-x}(-x+z-1) dx= -\Gamma(z) \\  \int_0^\infty x^{z-1}e^{-x}(-x+z-1) dx= -\Gamma(z) & \int_0^\infty x^{z-1}e^{-x} (x+x^2+(-1+z)^2-2xz)=? (x+x^2+(-1+z)^2-2xz)dx=? \\  \hline   \end{array}  \end{equation}