Math & Science ⇒ New at LaTeX coding

[Philosophaie]

I am new at LaTeX.

Could someone fix my code so it works.

Code: Select all

Code, edit and compile here:

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\documentclass[10pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\begin{document}
Some text here.
        $C_x = R1\timesR2 = \begin{array}{\hat{i} \hat{j} \hat{k}\\X1 Y1 Z1\\X2 Y2 Z2}  \end{array}$
        $C_{x_{12}} = (Y1 * Z2 - Z1 * Y2)$
        $C_{y_{12}} = (Z1 * X2 - X1 * Z2)$
        $C_{z_{12}} = (X1 * Y2 - Y1 * X2))$
        
\end{document}
 
 
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Run LaTeX here

[Johannes_B]

It would be better to state explicit errors problemm constructs. That means a meaningful title as well. For example, i have no idea how the output is supposed to look like.

Code: Select all

Code, edit and compile here:

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\documentclass[10pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\begin{document}
Some text here.
\begin{align*}
    C_x &= R1\times R2 = \begin{array}{c}%
        \hat{i} \hat{j} \hat{k}\\
        X1 Y1 Z1\\
        X2 Y2 Z2\\
    \end{array}\\
    C_{x_{12}} &= (Y1 * Z2 - Z1 * Y2)\\
    C_{y_{12}} &= (Z1 * X2 - X1 * Z2)\\
    C_{z_{12}} &= (X1 * Y2 - Y1 * X2))
\end{align*}
\end{document}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Run LaTeX here

You can read a lot about mathematical typesetting in Math mode.