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+% exp(-t)
+ \SCALEVARIABLEfunction
+ {-1}{\EXPfunction}
+ {\NEGEXPfunction}
+
+% exp(-t)cos(t)
+ \PRODUCTfunction
+ {\NEGEXPfunction}
+ {\COSfunction}
+ {\NEGEXPCOSfunction}
+
+% 3t^2-2exp(-t)cos(t)
+ \LINEARCOMBINATIONfunction
+ {3}{\SQUAREfunction}
+ {-2}{\NEGEXPCOSfunction}
+ {\myfunction}
+
+\myfunction{5}{\sol}{\Dsol}
+
+If
+\[
+ f(t)=3t^2-2\mathrm{e}^{-t}\cos t
+\]
+then
+\[
+\begin{gathered}
+ f(5)=\sol\\
+ f'(5)=\Dsol
+\end{gathered}
+\]