-3a^2*a^2*a(-a^2)

-3a^2 * a^2 *a (-a^2)

=-3a^2 a^2 a (-a^2)

=-3*1*1*-1=3 is the number

a^2*a^2*a^1*-a^2

when multipying you add the exponents

2+2+2+1=7 is the exponents

=3a^7