#### Answer

$3^{1}\times 5^{2} \times 7^{3}$

#### Work Step by Step

When we write a number using exponents, we write the number and then put the exponent above it; this exponent tells us how many times to multiply that number by itself. Here, we see that 5 is multiplied by itself 2 times, 7 is multiplied by itself 3 times, and 3 is multiplied by itself 1 time, so we know that the answer should be: $3^{1}\times 5^{2} \times 7^{3}$.