50*/*per hour

Usually replies in 50 minutes

Calculus
| 10+ other subjects

50*/*per hour

Usually replies in 15 hours

Calculus
| 10+ other subjects

35*/*per hour

Usually replies in 3 hours

Linear Algebra
| 9 other subjects

40*/*per hour

Usually replies in 2 hours

Calculus, Linear Algebra
| 10+ other subjects