Is it permissible to combine tasbih, Salat upon the Prophet, the supplication of Yunus, and a personal supplication in every prostration?

Glorification (Tasbeeh) in prostration (sujood) is a Sunnah according to the majority of scholars. It can be achieved with a single utterance, though three times is better. It is permissible to supplicate during prostration with whatever the Muslim desires from the good of this world and the Hereafter. It is also permissible to say "There is no god but You; glory be to You. Indeed, I was among the wrongdoers" (La ilaha illa Anta, Subhanaka, inni kuntu min al-dhalimeen) and to send blessings upon the Prophet, peace be upon him, while in prostration.