$5x\left(x+2\right)^3-25x^3\left(x+2\right)^2+15x\left(x+2\right)^4$

$x+7<8$

$\lim_{x\to0}\left(\frac{x-\left|x-1\right|}{2x}\right)$

$\int\left(\frac{x}{\sqrt{4x^2-49}}\right)dx$

$x^3-12x^2+47x-60$

$\frac{1}{2}\left(\cos\left(4x\right)-1\right)=\cos^2x$

$\left(27\right)\left(242\right)$