If you really study math for 6 hours every day, for a month. I've been talking for a month. Or a child with an average IQ, no problem for a month. A little talent, a week is enough. Learning and mastering are different. Learning is to know what's going on, and you can do some basic questions correctly, although it will take more time. The requirements for mastering are relatively high, and one month is definitely not acceptable.
Compulsory one, mainly including sets, mappings and basic elementary functions, 18 hours is enough.
Compulsory two, solid geometry and plane analytic geometry, 30 hours is definitely enough for beginners.
Compulsory three, statistics, algorithm preliminary and probability. 18 hour is absolutely enough.
Compulsory four, mainly vectors and trigonometric functions. 36 hours is enough.
Compulsory five, solving triangles, sequences and inequalities. 30 hours is definitely enough.
Elective, conic (ellipse, hyperbola, parabola) complex operation, derivative. Proposition and logic, etc. You must have basically learned it in 48 hours.
3 days +5 days +3 days +6 days +5 days +8 days =30 days.
But it is still not recommended to think and learn in this way.