$\left(x^2-4y^6\right)\left(x^2+4y^6\right)$

$y'-3000ky=-ky^2$

$\frac{d}{dx}y=\frac{1}{e^x}$

$\left(\frac{2}{3}ab^2+2c\right)\left(\frac{2}{3}ab^2-2c\right)$

$\left(\left(\frac{\left(x+2\right)}{\left(x+5\right)}\right)\right)^2+4$

$am+6bn+3bm+2an$

$\int\frac{4x+9}{2x^2-5x-3}dx$