$m^2.2m$

$\left(4a^2-2ab+9b^2\right)\cdot\left(7a^2+5ab-2b^2\right)$

$x2\:-25\:=\:\:\left(\:x\:+5\right).\:\left(x\:-\:5\right)$

$8\left(1\right)+16\cdot1^2+4\left(1\right)+10-2\left(1\right)+4\cdot4\left(1\right)^2+16\left(1\right)+74$

$\left(6-3.2\right)\left(3-2.6\right)$

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

$2x^2+7+6x-1-7x-6x^2$