Declension table of ?manmathāyatana

Neuter	Singular	Dual	Plural
Nominative	manmathāyatanam	manmathāyatane	manmathāyatanāni
Vocative	manmathāyatana	manmathāyatane	manmathāyatanāni
Accusative	manmathāyatanam	manmathāyatane	manmathāyatanāni
Instrumental	manmathāyatanena	manmathāyatanābhyām	manmathāyatanaiḥ
Dative	manmathāyatanāya	manmathāyatanābhyām	manmathāyatanebhyaḥ
Ablative	manmathāyatanāt	manmathāyatanābhyām	manmathāyatanebhyaḥ
Genitive	manmathāyatanasya	manmathāyatanayoḥ	manmathāyatanānām
Locative	manmathāyatane	manmathāyatanayoḥ	manmathāyataneṣu

Compound manmathāyatana -

Adverb -manmathāyatanam -manmathāyatanāt