$\frac{d}{dx}\left(y\right)-\left(x-y\left(x\right)+1\right)^2=x-y\left(x\right)$

$-50000x^2+35x+25$

$\left(t-9\right)^2$

$\lim_{x\to\infty}\left(\frac{6x^2+4x}{e^x\:+\:2}\right)$

$2x^3\left(2x+3\right)\left(2x-3\right)$

$\left(-4x^3-1\right)\left(-x^3+2\right)$

$3x^2+18x+81$