I spet a little time last weekend writting a complete ORBAT of Ground Forces of Russia in Spanish Wikipedia.
With the current data is this:

This is what results from this ORBAT assuming:
Tank Brigade: There is one, it has 3 tank battalions and a rifle battalion.
Tank Regiment: There are 14, they have 3 tank battalions and a rifle battalion each.
Independent Tank Battalion: There are two in the 19th and 20th divisions (of 4 companies)
Heavy Motorized Rifle Brigade: There is 1, they have 2 rifle battalions and 2 tank battalions.
Motorized Rifle Brigade: There are 20, they have 3 rifle battalions and a tank battalion each.
Motorized Mountain Rifle Brigade: There are 2, they have 3 rifle battalions.
Mixed Brigade (Military Base abroad): There are 3, they have 4 rifle battalions and a tank battalion (of 4 companies)
Motorized Rifle Regiment: There are 24, they have 3 rifle battalions and a tank battalion each, (except in divisions 19, 20 and 42 where they do not have their own tanks)
Special Purpose Motorized Rifle Regiment: There is 1, they have 3 Rifle Battalions.
Artillery Regiment with Machine Guns (Island Garrison Fortress): There are 2 in the Kuril Islands, they include a tank company
There are 85 Tank battallions and 170 Motor Rifle RegimentsYou can see how the brigade model is being changed to a divisional model
In the
"West" Military District the 6th Army should be separated for the
new Leningrad Military District and
must be added a new Army in Karelia to counter NATO
Meanwhile the 1st and 20th Armies must configure the
new Moscow Military DistrictIn the
"South" Military District, the units of the new territories must be added to the 8th Army, while the latter cedes its easternmost units to the 49th Army and continues the transition to the divisional model.
In the
"Center" Military District, the 90th Tank Division should be used to create a Tank Army, while both armies adopt the divisional composition.
In the
"East" Military District there are too many armies, the 29th and 36th should be merged, in fact I thought that both are reserve armies, that is, they are not fully operational. They have many redundant units in the army but very few real units of maneuver, which should be unified into a single army
Finally, the 68th Army Corps is actually a territorial defense force that includes garrison units on various islands.