How can one increase the reward in studying mathematics and make it like studying the Sharia sciences, and is there a suggested schedule for time management?

A student of mathematics can be rewarded for his studies with the intention of benefiting himself and his nation. Thus, his studies do not fall outside the sphere of servitude to Allah. Time management is essential to combine interests and fulfill rights, prioritizing the more important over the important and giving every right-holder their due. As for listening to the Quran during study, the mentioned fatwas can be reviewed.