Question

12/7y² * y^{5 *} 14y - (4/5)y² * 5y²

Answer 1

$\Rightarrow\dfrac{12}{7y^2}\times y^5\times14y-\dfrac{4}{5}y^2\times5y^2$

$\Rightarrow 24 \dfrac{y^6}{y^2}-4y^4$

$\Rightarrow24 y^4-4y^4=20y^4$