Declension table of samastha

Masculine	Singular	Dual	Plural
Nominative	samasthaḥ	samasthau	samasthāḥ
Vocative	samastha	samasthau	samasthāḥ
Accusative	samastham	samasthau	samasthān
Instrumental	samasthena	samasthābhyām	samasthaiḥ samasthebhiḥ
Dative	samasthāya	samasthābhyām	samasthebhyaḥ
Ablative	samasthāt	samasthābhyām	samasthebhyaḥ
Genitive	samasthasya	samasthayoḥ	samasthānām
Locative	samasthe	samasthayoḥ	samastheṣu

Compound samastha -

Adverb -samastham -samasthāt