$2\left(x-3\right)<5\left(x-7\right)-1$

$\frac{dy}{dx}=\frac{y}{x}+cos\left(\frac{y-x}{x}\right)$

$\int\frac{1}{x^2+4x+53}dx$

$\lim_{x\to-2}\left(x\left(3x-1\right)\left(x+2\right)\right)$

$6 y ^ { 2 } + 5 y = 0$

$0.344\cdot12^3-6.2\cdot12^2+37.2\cdot12-74.4$

$a^4-3a^3+5a^2b^2$