$5x^2y-8xy^2-9y^3;\:x=2;\:y=-1$

$-4-4\cdot4\cdot\left(-8\right)+3\cdot2\cdot\left(-8\right)-5$

$\left(2x^3+\sqrt{2}\right)^2$

$5+2\left[3-4\left(6+2\right)+5\left(3-2\right)-8\right]+3\left(6+4\right)$

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

$n\left(600-30n\right)$

$\left(\frac{5}{7}a^2+n\right)^2$