Factor the following expression by taking out the common factor: $3p\left(3q-r+s\right)+20t\left(3q-r+s\right)$3p(3q−r+s)+20t(3q−r+s)
Simplify $\frac{x^2+144}{2\left(x+12\right)}+\frac{12x}{x+12}$x2+1442(x+12)+12xx+12.
Factor the following expression:
$5y\left(y-10\right)+4\left(10-y\right)$5y(y−10)+4(10−y).
Factor the denominators and then simplify:
$\frac{2}{x^2+11x+18}-\frac{5}{x^2-4}$2x2+11x+18−5x2−4