Testing latex on blogger

The sample mean $\bar{X}$ is read as $x-$bar. The regression coefficient $\hat{\beta}$ is estimated using least squares criterion.


General Forms
$\int u^n \ dv = \frac{u^{n+1}}{n+1}+C, \quad n \ne -1$
 $\int u \ du = uv -\int v \ du$
$\int \frac{du}{u} = \ln |u| +C$

$\int e^u \ du = e^u +C$
$\int a^u \ du = \frac{a^u}{\ln a} +C$

Now I am testing how to enter code:


d1<-read.table("65-555-reg.txt", header=T)
d2<-data.frame(time=c(d1[,1]), cases=c(d1[,2]), distance=c(d1[,3]))
attach(d2)
scatterplot3d(cases, distance, time, angle=20, col.axis="blue",
col.grid="lightblue", main="Three-dimensional scatterplot",
pch=21, box=F, cex.symbols=2)
detach(d2)