Science Bowl Question

W) a^2 - 4/a + 3 (read as: a squared minus 4 over a plus 3)

X) 3a^2 - a^-2 + 1 (read as: 3 a squared minus a to the minus 2 plus one)

Y) 15a^2 - a^1.5 - 3 (read as: 15 a squared minus a to the 1.5 minus three)

Z) a^3