7+7=34
7 + .1
If you mean 7x^3, you would write 7x*x*x . If you mean (7x)^3, you would write x*x*x*7*7*7. Exponential form just means you write it in the expanded form. For instance, 7 squared really means 7 times 7. So instead of writing 7^2, you would write 7*7
Seven squared is 49, or 49.0 in decimal form.
7 + 5/10
-16807
7 + 0.03 + 0.004
10 + 7 + 0.05
60 + 7 + 0.9
70 + 7 + 0.01
3000 + 40 + 7
5*10 + 7