$2xy'-y=-2xy^3$

$3x-8x-7x^2+9x^2-12x+10x^2$

$\left(2\right)^2-2\left(2\right)\left(\frac{1}{x}\right)+\left(\frac{1}{x}\right)^2$

$\frac{\sqrt{x}}{\sqrt[4]{x}}\cdot\frac{\sqrt[4]{x^5}}{\sqrt{x^3}}$

$1-\left(16a^2-24a+9\right)$

$9x^2-18x+4y^2+24y+9=0$

$\left(4x-5\right)\:\left(x^2+6x-7\right)$