Results 7 issues of Galaxy

Can you help me, I want to implement 4.pow(0.5) This calculation What should I do

I want to use schnnor to realize anonymous transfer on ethereum how do i do

how to run a mainnet node?

Downloading zksolc 1.3.5 Error in plugin @matterlabs/hardhat-zksync-solc: connect ECONNREFUSED 0.0.0.0:443 how to solve this

![image](https://user-images.githubusercontent.com/30950645/40399016-9eea2bb8-5e6d-11e8-8d27-c2a2ee3920b7.png) ![image](https://user-images.githubusercontent.com/30950645/40399021-a2c9836e-5e6d-11e8-9800-a1adf02006ad.png) ![image](https://user-images.githubusercontent.com/30950645/40399024-a5744806-5e6d-11e8-9a0d-cf0c6e41205a.png)

![image](https://user-images.githubusercontent.com/30950645/85827851-a9926d80-b7b9-11ea-888d-6f787830ca2c.png)

How to use rpc for scanning blocks