help me please I will mark BRAINLIEST

Answer:
exponents are rather fuzzy so check my work, just use the same pattern
Step-by-step explanation:
a) 4⁹⁺³ = 4¹² = 16,777,216
b) 6⁵⁺² = 6⁷ = 279,936
c) 8⁶ + 8¹ = 262,144 + 8 = 262,152
d) 7⁸ + 7⁶ = 5,764,801 + 117,649 = 5,882,450