$\left(x^2+7x+5\right)+3x^2+21x+17$

$\frac{x^3+3}{x^2-1}$

$\frac{2}{x}-\frac{7}{\sqrt{x}}=-5$

$\left(x^4-16\right)\cdot\left(x^4-2\cdot x^2+1\right)\cdot x$

$x\cdot\left(y\right)^'\:+\:y\:=\:sin\:\left(x\right)$

$\int\frac{3x+5}{x^2+2x+4}dx$

$-13+9\cdot4-17\cdot0-7$