Declension table of samastha

Neuter	Singular	Dual	Plural
Nominative	samastham	samasthe	samasthāni
Vocative	samastha	samasthe	samasthāni
Accusative	samastham	samasthe	samasthāni
Instrumental	samasthena	samasthābhyām	samasthaiḥ
Dative	samasthāya	samasthābhyām	samasthebhyaḥ
Ablative	samasthāt	samasthābhyām	samasthebhyaḥ
Genitive	samasthasya	samasthayoḥ	samasthānām
Locative	samasthe	samasthayoḥ	samastheṣu

Compound samastha -

Adverb -samastham -samasthāt