x=(-b +- sqrt(b^2 – 4ac))/(2a)
)/(2a)&f=AsciiMath)
x/x={(1,if x!=0),(text{undefined},if x=0):}
,(text{undefined},if x=0):}&f=AsciiMath)
[[a,b],[c,d]]((n),(k))
,(k))&f=AsciiMath)
\begin{aligned} \dot{x} = \sigma(y-x) \\ \dot{y} = \rho x - y - xz \\ \dot{z} = -\beta z + xy \end{aligned}
 \\ \dot{y} = \rho x - y - xz \\ \dot{z} = -\beta z + xy \end{aligned}&f=TeX)
d/dxf(x)=lim_(h->0)(f(x+h)-f(x))/h
=lim_(h->0)(f(x+h)-f(x))/h&f=AsciiMath)
\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)
^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)h&f=TeX)