$42^2+16$

$\frac{dy}{dx}=\frac{\left(4x+3\right)}{y}$

$\left(7\right)^2\cdot7\cdot\left(7\right)^2$

$\frac{dy}{dx}=\left(2x+1\right)\sqrt{y+1}$

$-690\:+\:-476\:=\:$

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

$9x^2-30x+425$