Final answer:
To simplify the given expressions, we can determine if there are any like terms or operations to combine.
Step-by-step explanation:
To simplify the expressions:
a) 6x⁸
We cannot simplify this expression further since there are no like terms or operations to combine.
b) 7a²+5c
We cannot simplify this expression further since there are no like terms or operations to combine.
c) x⁶+x³
We can simplify this expression by adding the like terms x⁶ and x³. The resulting expression is 2x⁶.
d) 61.23
This expression is already simplified.