Answer:
Just multiply each other.
Tip:
aˣ · aⁿ = aˣ⁺ⁿ
So let's get to solving.
a⁵ × a = a⁵⁺¹ = a⁶
b² = b² (because there is no b value to multiply with)
c⁵ × c² = c⁵⁺² = c⁷
Put it altogether to get,
a⁶b²c⁷