Bài 4:
a: \(2^2\cdot2^5=2^7\)
b: \(7^2\cdot7^4\cdot7^7=7^{13}\)
c: \(a^5:a^9=a^{-4}\)
d: \(t\cdot t^7:t^6=t^2\)
Bài 3:
a: \(8^3\cdot2^4=2^9\cdot2^4=2^{13}\)
b: \(2^5\cdot4^3\cdot16^2=2^5\cdot2^6\cdot2^8=2^{19}\)
c: \(8^2\cdot2^3\cdot4^5=2^6\cdot2^3\cdot2^{10}=2^{19}\)
d: \(3^5\cdot3^2\cdot9^3=3^7\cdot3^6=3^{13}\)
e: \(3^4\cdot27^3:81^2=3^4\cdot\dfrac{3^9}{3^6}=3^7\)
f: \(10^3\cdot100^3:1000=1000^2\)
