book Maths Puzzle Numerical Ability

2x-(-34)=16

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hello,
this problem is driving me crazy. It is,in paranthesis, (3 sqrt 5)^5
Could you please show me how it is worked?
Thank you
I need some help on this problem.
Jerry earned $18,500 one year and then received a 10.5% raise. What is his new yearly salary?
Thanks,
Lyn