$\left[6-\left(-2\right)\:\left(8-10\right)\right]\left[\:\left(1-7\right)\:\left(0\right)\right]\:\left(1-7\right)$

$\left(3m^2-7\right)^2$

$\lim_{x\to0}\left(\frac{cos\left(4x\right)-cos\left(6x\right)}{x^2}\right)$

$\frac{\left(x^3-x^2-10x+10\right)}{x-3}$

$\lim_{x\to0}\left(\frac{e^x-\sin\left(2x-1\right)}{\ln\left(1+2x\right)}\right)$

$x^2+10\ge0$

$\left(3a^4-a^2\right)\left(3a^4+a^2\right)$