The expression (3a^2 b^3 c^2)^2(2a^2 b^5 c^5)^3 equals na^rb^sc^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:?

[NOTE: Your answers cannot be algebraic expressions.]