Can you please check these problems?

1. 5�ã28+2�ã45=_____

I got 10�ã7+6�ã5

2. -4�ã75+3�ã147=_____

I got 1�ã21

3. -11�ã8-7�ã12=______

I got -11�ã8-14�ã3

4. �ã150-5�ã96

I got -15�ã6

5. 9�ã13-6�ã11+�ã13=___

I got -6�ã11+10�ã13

Assuming your ã is √

#3 , the -11√8 becomes -22√2

the rest are correct