4×+3+(-3×)+7×-6×
I've been trying to figure ut out but I cant

How to do this , and can some one explain

5. (03.02)if g(x) = x2 + 3, find g(4). (2 points)1619811

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.