Answer:
x^4/21
Step-by-step explanation:
see below
5^2 means 5*5 not 5*2
5^2 = 5*5 = 25 not 10
a) 30
b) 144
c) 4
d) 900
a) 6 + 24 = 30
b) 6 * 24 = 144
c) 24 ÷ 6 = 4
d)