$y''+20y'+100y=0,\:y\left(0\right)=y'\left(0\right)=1$

$\left(\sqrt{2^{\left(x-1\right)}}\right)\cdot\left(\frac{1}{2}\right)^x$

$\left(3x-2\right)^2+\left(-2x+1\right)-3\left(6x^2-4x^2+3x-2\right)$

$2\:-m\:+\:10\:-10m$

$5n+5=45$

$x\frac{dy}{dx}+x\ln\left(x\right)$

$\left(-4\right):\left(-2\right)$