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- \documentclass{article}
- \usepackage{amsmath}
- \usepackage{newpxtext}
- \usepackage{eulervm}
- \pagestyle{empty}
- \begin{document}
- \[
- \everymath={\displaystyle}
- \begin{array}{l@{\ }l@{\ }l}
- \sum_{n = 0}^\infty F_n x^n
- & = & 0x^0 + 1x^1 + \sum_{n = 2}^\infty (F_{n - 1} + F_{n - 2}) x^n \\
- & = & 0x^0 + 1x^1 + \sum_{n = 2}^\infty F_{n - 1} x^n + \sum_{n = 2}^\infty F_{n - 2} x^n \\
- & = & 0x^0 + 1x^1 + \sum_{n = 0}^\infty F_n x^{n + 1} + \sum_{n = 0}^\infty F_n x^{n + 2} \\
- \\
- \rlap{$\left( \sum_{n = 0}^\infty F_n x^n \right) (1 - x - x^2) = x$} \\
- \sum_{n = 0}^\infty F_n x^n
- & = & \frac{-x}{x^2 + x - 1}
- \end{array}
- \]
- \end{document}
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