ما هي الآية التي تُقرأ بعد كل صلاة من الصلوات الخمس لتيسير أمور الدنيا، وما فائدتها؟

No specific verse has been designated to be recited after every prayer for facilitating matters. However, supplication (du'a) in general is prescribed after prayer. The worshipper may supplicate to Allah Almighty with whatever easy for him from the reported supplications (du'a ma'thur) or others, for the fulfillment of his worldly and otherworldly needs. The best is to supplicate with the reported (ma'thur) supplications.