TEX/Favorites

$(12.)\,$

$(12.)\,$	$(12.)\,$
\textstyle \frac{x}{y}	frac{x}{y}
\textstyle \sum_x^n	\sum_{x=1}^{n}
\textstyle \prod_x^n	\prod^{x=1}_{n}
\textstyle \int_a^b	\int_{a}^{b} f (x)\,dx
\textstyle \frac{\partial x}{\partial y}	\frac{\partial x}{\partial y}
\textstyle \sqrt x	\sqrt{x}
\textstyle \sqrt[3]{x}	\sqrt[3]{x}
\textstyle f(x)	f(x)
\lim	\lim_{x\to\infty}
***
\sin	\sin (x)
\cos	\cos (x)
\tan	\tan (x)
\log	\log (x)
\ln	\ln (x)
***
\le	\le
\ge	\ge
\neq	\neq
\approx	\approx
\equiv	\equiv
\propto	\propto
\infty	\infty
***
\alpha	\alpha
\beta	\beta
\gamma	\gamma
\delta	\delta
\epsilon	\epsilon
\zeta	\zeta
\eta	\eta
\theta	\theta
\vartheta	\vartheta
\kappa	\kappa
\lambda	\lambda
\mu	\mu
\xi	\xi
\pi	\pi
\rho	\rho
\sigma	\sigma
\tau	\tau
\phi	\phi
\varphi	\varphi
\chi	\chi
\psi	\psi
\omega	\omega
***
\Rightarrow	\Rightarrow
\rightarrow	\rightarrow
\Leftarrow	\Leftarrow
\leftarrow	\leftarrow
\Leftrightarrow	\Leftrightarrow
\vec{x}	\vec{x}
***
(	\left(
)	\right)
[	\left[
]	\right]
\{	\left{
\}	\right}
\textstyle {n \choose k}	{n \choose k}
***
\Box	\Box
\forall	\forall
\exists	\exists
\in	\in
\not\in	\not\in
***
\mbox{Taylor}	f(x) = \sum_{k=0}^{\infty } \frac{ f^{k} (a) }{ k! } (x - a)^k
\mbox{Euler}^1	e^{i \varphi } := \cos \varphi + i \sin \varphi