$\left(s^2-6+25\right)$

$x\left(x+1\right)y'-y=2x^2$

$\frac{125x^3-343}{5x-7}$

$\left(-2\right)-\left|\left(-6\right)\cdot\left(-14\right)\right|-\left|\left(-15\right)-2\right|$

$\frac{5i}{-2-6i}$

$f\left(x\right)=\frac{\left(x\left(x^2-9\right)^2\right)}{x-2}$

$\left(\frac{1}{2}x+y\right)^3$