The expression ( 5b^− 3 * c^− 2 )^4 * ( 4b^− 5 * a^− 1 )^0 = na^r * b^s * c^t

where n , the leading coefficient, is:

and r , the exponent of a , is:

and s , the exponent of b , is:

and finally t , the exponent of c , is: