can anyone let me know of equations supporting isomerisation, cracking and reforming?

Answer 1

I don't know of equations supporting isomerisation .
Isomers are chemical structures.
Cracking
C10H22 = C8H18 + C2H4
Alkane = A shorter chain alkane and an Alkene.

Lots more in this category.

Reforming.

Taking octane as an example (C8H18)
This may be a straight chain alkane.
CH3CH2CH2CH2CH2CH2CH2CH3 n-Octane.
This can be reformed into an branched chain.

CH3 CH(CH3)CH2 CH(CH3)CH2CH3
2,4-dimethylhexane.
It contains the same number of carbons and hydrogens but they are arranged differently in space.

Answer 2

Isomerisation