For words which are mutamathilan sagheer, if there is a waw with shaddah and before it a dhammah or fathah for example in surah al baqarah ayah 61 the word 'asaw wa kanu' or ya with shaddah and before it a kasrah or fathah, do we read with nabr?

Question
Assalamu alaikum wa rahmatullahi wa barakatuh
For words which are mutamathilan sagheer, if there is a waw with shaddah and before it a dhammah or fathah for example in surah al baqarah ayah 61 the word  or ya with shaddah and before it a kasrah or fathah, do we read with nabr?

Answer
Wa alaikum assalaam wa rahmatullahi wa barakaatuh
If there is a with a vowel preceded by a with a fathah, the first merges into the second and the shaddah is a result of the merging.  There is a nabr in this case to prevent one from lengthening the saakinah into a leen letter.  
The same case holds true if the letter preceding the mushaddah has a dhammah, we use a nabr to prevent a lengthening .  There is no idghaam mutamaathilayn in this case though. 
Likewise for the ya'. 
For more information, please see the following lessons:
http://www.abouttajweed.com/the-accent-in-recitation-of-the-glorious-qur-an/the-accent-in-recitation-of-the-glorious-quran-p-2.html

http://www.abouttajweed.com/the-accent-in-recitation-of-the-glorious-qur-an/the-accent-in-recitation-of-the-glorious-quran-p.html