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Howto write equations in latex in Blogs or websites

1. For websites it is a little bit non-trivial. Just write the equations in Mathematica and save as xml+MathML type. Now open that xml file in any text editor and copy paste the portion starting with in the corresponding HTML code. That's it.

2. For blogs it's much easier. Just write the equation in LaTeX and sandwitch it between

like this \frac{1}{\kappa} \int d^{N+1}x \sqrt{-G} \ \exp^{-2\phi} \left[ c %2B R \right]+&bg=ffffff&fg=333333&s=0 +&bg=ffffff&fg=333333&s=0

This gives the following equation.

This will generate the picture of the equation dynamically. Now add the image URL to the blog.

One word of caution. Some of the characters are not easily recognised, like =, +. For them use the HEX code instead. In the link presented above I have used the HEX code %3D instead of = . A quick way to get the HEX code is to go here (
One more thing is that if this is done in blogger aas I have done it will stretch the image. To restore to its original form goto the edit HTML and remove the width option from the code of the picture. The code will start with a. Just change the width to auto like width : 400px.

The same procedure can be followed for websites but this dynamic rendering of the equation image puts a lot of load on the servers of wordpress. It is unfair to do so for our own advantage.


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Pratham college-er din ta
Aajo thik e mone poRey scene ta
Dada didi haath dhorey siNRi tei bose poRey
Aamar chokh ta ghorey bon bon bon bon

Sweetheart, I am seating alone
Sweetheart, for me there is none

DhoNk gile chole gelo pratham maas
Meye dekhlei feli deergho-shwash
DhoNk gile chole gelo pratham maas
Meye dekhlei othe nabhishwash
Meyera bheeshan smart poRey chhoto mini-skirt
Aamar e je sheet korey kon kon kon kon

Sweetheart, I am seating alone
Sweetheart, for me there is none

Taarporey kete gelo maas chaar
Fuse holo je kato future
Bandhura purse khule eke oke taake tole
Aamar pran ta korey chon mon chon mon

Sweetheart, I am seating alone
Sweetheart, for me there is none

Ekdin lawn theke beriye
Ek tanayaar dike taakiye
Hawt korey ki je holo magaj ta ghurey gelo
Taar kaaner saamne kori ghyan ghyan ghyan ghyan

Sweetheart, I am seating alone
Sweetheart, for me there is none

Taarpore cla…

How to join audio tracks smoothly in Audacity

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Today I am going to take a small track like a small 1 min. clip of storm sound and make a long continuous sounding storm audio clip from it.

STEP 1 : Open file
Open the clip in Audacity.

STEP 2 : Removing unwanted audio portion
There is always unwanted sections of the audio that we have to discard. Select the portion of background noise or unwanted audio.

Press DELETE key.

STEP 3 : Duplicating the track
Now we make a copy of the entire waveform and paste it at the end of the track.

Select the SELECT tool (the one which looks like I). Then select the whole waveform and prss Ctrl+c. Now click approximately at the end of the…