(18t^4 - 4t^2 + 10^t) + (4t^4 - 10t + 27) - (10t^4 + t2 + 18)
Combining like terms, the expression simplifies to:
18t^4 - 4t^2 + 10^t + 4t^4 - 10t + 27 - 10t^4 - t^2 - 18
Grouping the terms with same powers of t together, the expression further simplifies to:
(18t^4 + 4t^4 - 10t^4) + (-4t^2 - t^2) + (10^t - 10t) + (27 - 18)
Combining these terms, the expression becomes:
12t^4 - 5t^2 + 10^t - 10t + 9