What is the ruling on combining the Dhuhr, Asr, and Maghrib prayers after returning home due to studying and the unavailability of a place to pray at their prescribed times?

God has made prayer a temporary obligation, and it is not permissible for a Muslim to delay it or advance it except for an excuse such as combining prayers during travel, or due to rain or illness. Studying is not an excuse to delay prayer from its appointed time. One must repent to God and commit to praying on time. Prayer can be performed in any pure place other than a bathroom, for the Prophet, peace and blessings be upon him, said: "The earth has been made for me a mosque and a means of purification. So, whenever prayer overtakes any man of my nation, let him pray."