Declension table of ?manasyamāna

Neuter	Singular	Dual	Plural
Nominative	manasyamānam	manasyamāne	manasyamānāni
Vocative	manasyamāna	manasyamāne	manasyamānāni
Accusative	manasyamānam	manasyamāne	manasyamānāni
Instrumental	manasyamānena	manasyamānābhyām	manasyamānaiḥ
Dative	manasyamānāya	manasyamānābhyām	manasyamānebhyaḥ
Ablative	manasyamānāt	manasyamānābhyām	manasyamānebhyaḥ
Genitive	manasyamānasya	manasyamānayoḥ	manasyamānānām
Locative	manasyamāne	manasyamānayoḥ	manasyamāneṣu

Compound manasyamāna -

Adverb -manasyamānam -manasyamānāt