$\left(a^4+8\right)\left(a^5-1\right)$

$3\int sec\left(\theta\right)d\left(\theta\right)$

$\int\frac{\sqrt{1-25x^2}}{20x}dx$

$100-16x^2$

$\frac{-8x^4+12x^3+6x^2+19x+10}{-4x^2-5}$

$\int x\left(\sin\left(x\right)-\cos\left(x^2\right)\right)dx$

$\left(8.\left(-24\right)\right)+\left(8.7\right)$