$\left(-9^{3m}y^{2n-1}\right)\left(4x^5y^6\right)$

$x^2+14x+49=4$

$\left(x-3\right)^2+1\ge\:2$

$\int x\cdot\left(2x+2\right)^2dx$

$\lim_{x\to\infty}\left(\frac{\left(\frac{1}{\left(x+h\right)^2}-\frac{1}{x^2}\right)}{h}\right)$

$8x^2-8$

$\lim_{x\to\infty}\left(\frac{e^x-2.cos\left(x\right)+e^{-x}}{x.\sin\left(x\right)}\right)$