$16+625r^2+300r+400r+180$

$\int\frac{x^2+3}{\left(x+1\right)\left(x^2+1\right)^3}dx$

$4x^2+28x+45=0$

$\left(\frac{3}{4}\sqrt[3]{3a}\right)^3$

$\lim_{x\to0}\left(\left(4x+1\right)^{\cot\left(x\right)}\right)$

$5.38\cos\left(291.80\right)+5\sec\left(291.80\right)$

$-\left(-2\right)-9$