Bài viết nháp hiển thị công thức fast

Mathjax: ( f{(a)}=frac1{2pi i}oint_gammafrac{f(z)}{z-a}dz )

Mathjax: ( x=frac{-bpmsqrt{b^2-4ac}}{2a} )

$$x=frac{-bpmsqrt{b^2-4ac}}{2a}$$ 

$$left [ – frac{hbar^2}{2 m} frac{partial^2}{partial x^2} + V ight ] Psi = i hbar frac{partial}{partial t} Psi$$

The Lorenz Equations

$$egin{align}
dot{x} & = sigma(y-x)
dot{y} & = ho x - y - xz
dot{z} & = -eta z + xy
end{align}
$$

The Cauchy-Schwarz Inequality

$$ left( sum_{k=1}^n a_k b_k ight)^{!!2} leq left( sum_{k=1}^n a_k^2 ight) left( sum_{k=1}^n b_k^2 ight)$$

$$1 + frac{q^2}{(1-q)}+frac{q^6}{(1-q)(1-q^2)}+cdots =
prod_{j=0}^{infty}frac{1}{(1-q^{5j+2})(1-q^{5j+3})},
quadquad ext{for $|q|<1$}.$$