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Maybe a tabular is more feasible here: % arara: pdflatex \documentclass[12pt,lettersize]{article} \usepackage[top=1.25in, bottom=1.05in, left=0.5in, right=0.5in]{geometry} \usepackage{mathtools} \usepackage{booktabs} \usepackage{array} \makeatletter \newcases{mycases}{\quad}{% \hfil$\m@th\displaystyle{##}$}{$\m@th\displaystyle{##}$\hfil}{\lbrace}{.} ...


0

Renewing \arraystretch will solve both issues at once. It changes the height of rows in your array. So choosing an appropriate value will result in better spacing for the fractions in your system. Simultaneously it makes all your rows the same height, so the items in the left column are now the same size as the items in the right column which will align (a) ...


1

Try adding extra \\ or [9pt] after the \\ in the array of item d: \documentclass[12pt,lettersize]{article} \usepackage[top=1.25in, bottom=1.05in, left=0.5in, right=0.5in]{geometry} \usepackage{multicol} \usepackage{amsmath,amssymb,amsthm} \begin{document} \begin{enumerate} \item Solve each system of equations algebraically. \begin{multicols}{2} ...


2

If you want the horizontal and vertical lines to intersect, you can't use the rule-drawing macros of the booktabs package. Here's a solution that uses just a basic array environment. This solution is similar to the one given by @Alenanno in the posting you provided a link to; the main difference is that the @{} directives have been replaced with @{\,}. ...


4

Either multline (but I'd avoid it) or split: \documentclass{article} \usepackage[tbtags]{amsmath} \begin{document} The multline version \begin{multline} II^2\le \int_{2\theta(j-5)r^{}_{\!B}}^{\infty} \int_X \bigl|\bigl( t^{2(M+1)}L^{M+1}e^{-t^2L}b \bigr)(y)\bigr|^{2} \,d\mu(y)\frac{dt}{t^{4M+1}} \\ \le C(2^{\theta j}r^{}_{\!B})^{-4M} ...


2

Here is another option using arrays: \documentclass{article} \usepackage{amsmath} \newcommand{\toRoman}[1]{\text{\MakeUppercase{\romannumeral #1}}} \begin{document} \begin{equation*} \renewcommand{\arraystretch}{1.2}% http://tex.stackexchange.com/a/31704/5764 \begin{array}{r l} \multicolumn{2}{l}{\left.\kern-\nulldelimiterspace\begin{array}{@{}r ...


7

split is not intended to be used in that way, you really want aligned instead. \documentclass{article} \usepackage{mathtools} \newcommand{\trom}[1]{\makebox[0pt][r]{\MakeUppercase{\romannumeral #1}}} \begin{document} \begin{equation*} \begin{split} &\!\left . \!\begin{aligned} \trom{1}\quad & 2 + x_1 -2 = x_1 \\ ...


5

You can use empheq \documentclass{article} \usepackage{empheq} \begin{document} \begin{empheq}[left={\alpha(x)= \empheqlbrace}]{align} & x\\ & \frac{1}{1+e^{-kx}}\\ & \frac{e^x-e^{-x}}{e^x+e^{-x}} \end{empheq} \end{document}


2

With an eqnarray environment, you might write: \begin{eqnarray} a &=& b\\ c &=& d \end{eqnarray} With an align environment (be sure to load the amsmath package), you'd write \begin{align} a &= b\\ c &= d \end{align} The only significant change -- other than the change in the name of the environment, of course -- is that one ...



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