$\left(u-2\right)\left(-\frac{\left(5-4u\right)^{\frac{1}{2}}}{2}\right)$

$\frac{d^2y}{dx^2}\left(-\frac{1}{2}x^4-\frac{4}{5}x^5+\frac{1}{3}\right)$

$\sec\left(x\right)\left(1-\sin^2\left(x\right)\right)-\cos\left(x\right)$

$a^2-9a+5$

$\lim_{x\to0}3x\ln\left(x\right)$

$x^2y+x^2z$

$\left(2b-3c\right)\left(2b-5y\right)$