Answer:
so what's the question? i'm a bit confused..
Step-by-step explanation:
I am writing answers directly.
<h3>1. 5×5=

</h3><h3>2. -5×-5×-5×-5 =

</h3><h3 /><h3>3. 2×2×2=

</h3><h3>4. n×n×n×n×n×n=

</h3>
Step-by-step explanation:

While subtracting , the sign of each term of second expression changes & remove the parentheses.
⟶ 
Combine like terms. Like terms are those which have the same base. Only coefficients of like terms can be added or subtracted.
⟶ 
⟶ 
In standard from , the expression should be written in such a way that the power of variables goes from highest to lowest.

Hope I helped ! ♡
Have a wonderful day / night ! ツ
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Answer:
195
Step-by-step explanation:
3 x 60 = 180
180 + 15
195