a) [tex](7-3)^{3} = 4^{3} = 64\\
[/tex]
b)[tex](2+3)^{2} = 5^{2} = 25[/tex]
c)[tex]12^{2} - 5^{2} = (12 - 5) ( 12+5) = 7 * 17 = 119[/tex]
e)[tex]50^{2} -30^{2} = 2500 - 900 = 1600[/tex]
d)[tex]40^{2} + 30^{2} = 1600 + 900 = 2500[/tex]
f)[tex]2^{4} +3^{2} * 2 *5^{0} = 16 + 18 = 34[/tex]
g) 25 - 9 + 16 = 32
h) 225 - 4*9 = 225 - 36 = 189
i) 25 + 30 + 9 = 55 + 9 = 64
