Test

Math test

[math]\displaystyle{ f(x) = x^2\,\! }[/math]

Observe que la pendiente de la recta relacionada con Ana es:

[math]\displaystyle{ m_A = \frac {10 - 5}{0-4} = \frac {5}{4} }[/math]

text should be red

Carlos's code: This text should be red on the mobile interface and blue on the desktop interface.