most recent 30 from tex.stackexchange.com 2025-08-06T01:24:57Z https://tex.stackexchange.com/feeds/question/290371 https://creativecommons.org/licenses/by-sa/4.0/rdf https://tex.stackexchange.com/q/290371 3 hello https://tex.stackexchange.com/users/97179 2025-08-06T14:54:08Z 2025-08-06T19:42:45Z

<p>I have the sample below, When I compile and run, each step of the equation is left aligned with smaller fonts. What I'm trying to achieve is, each step of the equation should appear on a line by itself, normal fonts aligned at <code>=</code> sign.</p> <pre><code>\documentclass{article} \usepackage[margin=0.5in]{geometry} \begin{document} \begin{align*} \sum_{i=1}^{k+1} i^{3} = \left(\sum_{i=1}^{n} i^{3}\right) + i^3\\ &amp;=&amp; \frac{k^{2}(k+1)^{2}}{4} + (k+1)^3 &amp;=&amp; \frac{k^{2}(k+1)^{2} + 4(k+1)^3}{4}\\ &amp;=&amp; \frac{(k+1)^{2}(k^{2} + 4k + 4)}{4}\\ &amp;=&amp; \frac{(k+1)^{2}(k+2)^{2}}{4}\\ \end{align*} This proves that Eq. (3) holds. By induction, Eq (1) holds for all positive integers $n$ \end{document} </code></pre>

https://tex.stackexchange.com/questions/290371/-/290375#290375 6 egreg https://tex.stackexchange.com/users/4427 2025-08-06T15:15:32Z 2025-08-06T15:15:32Z

<p>You're using the syntax of <code>eqnarray</code>, and are forgetting to load <code>amsmath</code>; compiling your example produces scores of errors and the output is almost arbitrary.</p> <pre><code>\documentclass{article} \usepackage[margin=0.5in]{geometry} \usepackage{amsmath} \begin{document} \begin{align*} \sum_{i=1}^{k+1} i^{3} &amp;= \biggl(\sum_{i=1}^{n} i^{3}\biggr) + i^3\\ &amp;= \frac{k^{2}(k+1)^{2}}{4} + (k+1)^3 \\ &amp;= \frac{k^{2}(k+1)^{2} + 4(k+1)^3}{4}\\ &amp;= \frac{(k+1)^{2}(k^{2} + 4k + 4)}{4}\\ &amp;= \frac{(k+1)^{2}(k+2)^{2}}{4} \end{align*} \end{document} </code></pre> <p><a href="https://i.sstatic.net/1Ju67.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/1Ju67.png" alt="enter image description here"></a></p> <p>Note that the trailing <code>i^3</code> in the first row should be <code>(k+1)^3</code></p>

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