Which equations are correct?

Select each correct answer.




−4b^4(5b^2+6)=−20b^8−24b^3

−5x^3(3x^3+2)=−15x^9−10x^3

−3y^5(2y^3+3)=−6y^8−9y^5

−2c^6(5c^3+6)=−10c^9−12c^6