How do you do these two problems?

Question

1. -�ã338-�ã200+�ã162=_______

2. 2a2^b�ã363a6^b3^c5^=_____

Answer 1

Assuming ã means √,

√338-√200+√162
= √169√2 - √100√2 + √81√2
= 13√2-10√2+9√2
= 12√2

Do the other in the same way: extract perfect roots, and combine the other factors under a single √