v&aacute;rias vari&aacute;veis</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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<tr><td align="left" valign="top"><a href="#SEC187">45.5 Fun&ccedil;&otilde;es e Vari&aacute;veis Definidas para gr&aacute;ficos estat&iacute;sticos</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
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