Question

Which expression is not equivalent to the other expressions?

seven plus zero point five times four raised to the second power

two point five times the quantity sixteen minus two raised to the second power, end quantity

the quantity three raised to the third power plus three end quantity divided by two

the quantity twenty plus five raised to the second power, end quantity, divided by three

Answer 1

I may have made a mistake, but these are the answers I have.
7+.5(4^2)=15
2.5(16-2^2)=30
(3^3+3)/2=6
(20+5^2)/3=15

Answer 2

I found my mistake,
(3^3+3)/2=15
sorry.