PSTricks is a set of macros that allow the inclusion of PostScript code (e.g. drawings) directly inside (La)TeX code. This tag is compatible with the tag {diagrams}.

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Plotting sin(1/x) associated functions

I need to plot x, -x, x^2, -x^2, sin(1/x), x*sin(1/x), x^2*sin(1/x) and sin(1/x). But the functions containing sin(1/x) looks somehow bad. How can I fix it. I also do not know how to label the graphs ...