$x^2-2x\cdot0.1$

$\lim_{x\to0}\left(\cos\left(ax\right)-b\sin\left(bx\right)\right)$

$[\left(-8\right)+5\cdot2-4:\left(-2\right)]\cdot\left(-7\right)$

$4m+6-32m+48+64$

$\frac{d^2}{dx^2}\left(x+xy+y=5\right)$

$\lim_{x\to\infty}\left(e^x-\frac{e^x}{x+1}\right)$

$9m^3-36n^8$