Answer:
yes to the 158 :/ I don't know any thing that would need that big of a number :|
Explanation:
x^158
x^12^5 is x^60
x^-2^9 is x^-18
x^60*x^-18 = x^60-18=x^42
x^40^5 is x^200
x^42 *x^y=x^200
200-42 is 158
y=158.
The blank is x^158.
Hope this helps plz hit the crown :D
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