\begin{varwidth}{0.25\paperwidth}
    \begin{align*}
    <<line1_LHS>> &= <<line1_RHS>>\\
    <<line2_LHS>> &= <<line2_RHS>>\\
    <<line3_LHS>> &= <<line3_RHS>>\\
    <<line4_LHS>> &= <<line4_RHS>>\\
    <<line5_LHS>> &= <<line5_RHS>>\\
\end{align*}
\end{varwidth}