$-4x+5x+2$

$\frac{d}{dx}5y^4+5$

$\lim_{x\to0}\left(\frac{3x\left(\cos\left(9x\right)-1\right)}{\sin\left(9x\right)-9x}\right)$

$3\left(-8\right)^4-3\left(-8\right)^3-\left(-8\right)^2+3\left(-8\right)-1\:$

$a\left(b+y\right)-a\left(b-1\right)=a\left(ay-b\right)$

$10^3+25$

$\lim_{x\to3}\left(\frac{x-3}{x^2-5x+6}\right)$