Find each of the following products:
(a)`5x^2xx4x^3`
(b) `-3a^2xx\ 4b^4`

Find each of the following products: (i) (-5x y)xx(-3x^2y z) (ii) 1/2x y\ xx2/3x^2y z^2

Find each of the following products: (i) (-2) xx36xx(-5) (ii) (-2)xx(-4)xx(-6)xx(-8)

Find each of the following products: (a) 3 xx (-1) (b) (-1) xx 225 (c) (-21) xx (-30) (d) (-316) xx (-1) (e) (-15 xx 0 xx (-18) (f) (-12) xx (-11) xx (10) (g) 9 xx (-3) xx (-6) (h) (-18) xx (-5) xx (-4) (i) (-1) xx (-2) xx (-3) xx 4 (j) (-3) xx (-6) xx (-2) xx (-1)

Find each of the following products: (-2x^2)xx(7a^2x^7)xx(6a^5x^5) (ii) (4s^2t)xx(3s^3t^3)xx(2s t^4)xx(-2)

Find each of the products: (-5a)xx\ (-10 a^2)xx(-2a^3)

Find each of the following products: (-1/(27)a^2b^2)xx\ (9/2a^3b^2c^2) (-7x y)xx(1/4x^2y z)

Find each of the products: (-4x^2)xx(-6x y^2)xx(-3y z^2)

Evaluate each of the following products: (-1)xx(-2)xx(-3)xx(-4)xx(-5) (-3) \ xx(-6)xx(-9)xx(-12)

Find each of the products: (7a b)xx\ (-5a b^2c)xx\ (6a b c^2)

Find the following products: (i) 7/5x^2y(3/5x y^2+2/5x) (ii) 4/3a(a^2+b^2-3c^2)