latex exemplos

\( \begin{equation} f(x) = \begin{cases} EXPRESSAO1 & \ \text{se } \, CONDICAO1 \\ \\ EXPRESSAO2 & \ \text{se } \; CONDICAO2 \end{cases} \end{equation} \) \( \begin{equation} d(t) = \begin{cases} 30 + t sen(\pi t) & \ \text{se } \, 0 \leq t < 12\\ \\[1pt] 30 + 12 e^{(12 - t)} sen(\pi t) & \ \text{se } \; t \geq 12 \end{cases} \end{equation} \)
\( \\ \\ cis \\ \pm \\ \neg \\ \mathbb{N} \\ \mathbb{Z} \\ \mathbb{Q} \\ \mathbb{R} \\ \mathbb{C} \\ \mathbb{R}^+ \\ \mathbb{R}_0^+ \\ \mathrm{z_1} \\ z_1 \\ A \\ 5 \\ \pi \\ \mathrm{xOy} \\ \mathrm{g} \circ \mathrm{f} \\ \bullet \\ f^\prime \\ f^{\prime \prime} \\ f^{\prime \prime} (1) \\ \infty \\ \sqrt{2} \\ Ox \\ f \\ u_n \\ \bigcap \; \; \cap \\ \bigcup \; \; \cup \\ \cos{} \\ \in \\ \delta \; \; \triangle \; \; \bigtriangleup \\ \alpha \\ \theta \\ \beta \\ \circ \\ \subset \\ \forall \\ \exists \\ \overline{A} \\ \neq \\ \geq \\ \leq \\ > \\ < \\ ^{12}C_3 \\ \bigg( \\ \bigg[ \\ \displaystyle \lim_{x \rightarrow 2} \dfrac{x^2-2x}{f(x)-f(2)}=4 \\ \hat{a} \\ \wedge \\ \vee \\ \mid ?? \mid \\ \)
http://www.rpi.edu/dept/arc/docs/latex/latex-intro.pdf
\( \textit{italic Italic shape, used mostly for emphasis} \) \( \textsl{slanted Slanted shape, a bit different from italic} \) \( \textsc{Small Caps Small caps shape, use sparingly} \) \( \textup{upright Upright shape, usually the default} \) \( \textbf{boldface Boldface series, often used for headings} \) \( \textmd{medium Medium series, usually the default} \) \( \textrm{roman Roman family, usually the default} \) \( \textsf{sans serif Sans Serif family, used for posters, etc.} \) \( \texttt{typewriter Typewriter family, fixed-pitch characters} \) \( \textbf{\textit{This is bold italic}} \) \textbf{\textit{This is bold italic}}
\( 1234 \) emphasized Use for emphasis, usually changes to italic emphasized Use for emphasis, usually changes to italic
\( \textrm{abcdefghij} \quad \textsf{abcdefghij} \)
abcdefghij

This text is bold

This text is italic

This is subscript and superscript


https://tex.stackexchange.com/questions/74353/what-commands-are-there-for-horizontal-spacing
||||||||||||||||||||||||||||||||||||||||||||||||
\( \textsf{bd} \! \textsf{bd} \qquad \) \!
\( \textsf{bd} \, \textsf{bd} \qquad \) \,
\( \textsf{bd} \; \textsf{bd} \qquad \) \;
\( \textsf{bd} \enspace \textsf{bd}\qquad \) \enspace
\( \textsf{bd} \quad \textsf{bd} \qquad \) \quad
\( \textsf{bd} \qquad \textsf{bd} \qquad \) \qquad
\( \textsf{bd} \! \textsf{bd} \)
\( \textsf{bd} \, \textsf{bd} \)
\( \textsf{bd} \: \textsf{bd} \)
\( \textsf{bd} \> \textsf{bd} \)
\( \textsf{bd} \; \textsf{bd} \)
\( \textsf{bd} \enspace \textsf{bd} \)
\( \textsf{bd} \quad \textsf{bd} \)
\( \textsf{bd} \qquad \textsf{bd} \)
\( bd \! bd \)
\( bd \, bd \)
\( bd \: bd \)
\( bd \> bd \)
\( bd \; bd \)
\( bd \enspace bd \)
\( bd \quad bd \)
\( bd \qquad bd \)
\( \kern<5> aa \hskip<5> aa \hspace{<5>} aa \hphantom{} aa \)
\( \ aa aa ~ aa \hfill aa \hspace*{\fill} aa \)