$x^3+5x^2+5x-2$

$-19\cdot x^2+415\cdot x+3944$

$55b^2-25$

$\lim_{x\to\infty}\left(\frac{3^x-1}{3^x+1}\right)^{4x}$

$\left(-10+9y\right)\left(10+9y\right)$

$\lim_{x\to\frac{\pi}{2}}\left(\left(9tan\left(x\right)\right)^{9cos\left(x\right)}\right)$

$\int e^{-t}\cdot sin\:t\:dt$