Answer:
1. 7^4 + 19
=7x7x7x7 + 19
=2,401 + 19
= 2,420
2. 18 - 4^2
= 18 - 4x4
=18 - 16
= 4
3.9^3 - 720 + 9
=9x9x9 - 720 + 9
=729 - 720 + 9
= 729 - 720
= 9+9
= 18
4. 4 + 5^2 x 2
= 4 + 5x5 x 2
= 4 + 25 x 2
= 25 x 2
= 50 + 4
=54
5. 8^3 + 8
= 8x8x8 + 8
= 512 + 8
= 520
6.7^3 - 190
= 7x7x7 - 190
= 343 - 190
= 153
7. 18 + 4^2
= 18 + 4x4
= 18 + 16
= 34
8. 9^3 - 120 + 9
= 9x9x9 - 120 + 9
= 729 - 120 + 9
= 729 - 120
= 609 + 9
= 618
9. 4^2 x 2
= 4x4 x 2
= 16 x 2
= 32
10. 8^2 + 8
= 8x8 + 8
= 64 + 8
=72
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