No - the letters ŋ͡ɱ are superscripted to show that the following consonant is prenasalised as such, and the tie above the consonants shows co-articulation, same with the tie above ɡ͡b. The diaeresis (double dots) on the ä simply says it is centralised - if you look on the IPA vowel chart, /ä/ is just under /ɐ/ in the central "column"