Cesareo R.

Retired engineer from Escola Politecnica do Estado de São Paulo, giving back a little of what received from magnificent brazilian teachers. Among others, Leo Borges Vieira and Abrahão de Moraes.

11,571,553 students helped

Level 21 in Calculus Level 18 in Algebra Level 17 in Precalculus Level 15 in Trigonometry Level 15 in Physics Level 15 in Geometry Level 5 in Prealgebra Level 1 in Statistics