-3x6y4x-3y-2 Which what is the simplest form of this expression?

To simplify the expression (-3x^6y^4x^{-3}y^{-2}), first combine the like terms. The expression can be rewritten as (-3x^{6-3}y^{4-2}), which simplifies to (-3x^3y^2). Thus, the simplest form of the expression is (-3x^3y^2).