$2.\frac{d^5}{dx^5}-7.\frac{d^4}{dx^4}+12\frac{d^3}{dx^3}+8\frac{d^2}{dx^2}=0$

$4^2\:+2\:.\:4\:.\:-3\:+\:-3^2$

$p\left(1\right)=\:2x^6+\:3x^5+\:4x^4+5x^3+\:6x^2$

$100\cdot\left(23-2\right)-4+30\cdot\left(16+2\right)$

$x^2+4x-5\ge0$

$y^2+4y+2$

$\int\left(\left(x^2+8x+4\right)^5\left(2x+8\right)\right)dx$