$\frac{dy}{dx}=\left(10x-7\right)$

$\:7x\:+\:4\:per\:a\:x\:=\:-1$

$4\left(4x+3\right)^2$

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

$20.456+8.334$

$\lim_{x\to0}\left(\frac{sin^5x}{x^5}\right)$

$sec^2\left(12\right)-tan^2\left(12\right)$