$a-10=-3$

$5\left(x-y\right)-3\left(2x+y\right)$

$\frac{16x^2-24x+16}{x-4}$

$\lim_{x\to5}\:4+x^2-2x$

$f\left(x\right)=2x\left(\frac{3}{2}\right)+\frac{5}{2}x\left(\frac{1}{2}\right)-\frac{4}{3}x\left(\frac{3}{2}\right)$

$\lim_{x\to-3}\left(\frac{x^2+8x+15}{x^2+7x+12}\right)$

$w\left(x-y\right)-8\left(-y\right)$