70*/*per hour

Usually replies in 1 hour

Calculus
| 10 other subjects

80*/*per hour

Usually replies in 2 hours

Linear Algebra
| 2 other subjects

90*/*per hour

Usually replies in 5 hours

Calculus, Linear Algebra
| 10+ other subjects

120*/*per hour

Usually replies in 5 hours

Calculus, Linear Algebra
| 10+ other subjects