$\left(+4\right)-\left(+8\right)-\left(-3\right)+\left(+2\right)-\left(-5\right)$

$\frac{100x^{15}}{25x^{5}}$

$\left[\left(3p-q\right)-\left(2p+q\right)\right]\:-\:\left[2p-\left(3q-p\right)\right]$

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

$\lim_{x\to1}\left(\frac{\left(x+3\right)\left(x-1\right)}{x^2-1}\right)$

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

$10\:+\:\left(2\right)+1$