$\left(3x^2-6x\right)\cdot\left(\sin\left(x\right)+\cos\left(x\right)\right)$

$\int\left(5x^2+3\right)^3\cdot10xdx$

$9x^2+10x+225$

$\lim_{x\to\infty}\left(120-80e^{-0.3x}\right)$

$sin\left(sin^{-1}\left(\frac{6}{7}\right)+cos^{-1}\left(-\frac{3}{4}\right)\right)$

$\frac{r^{12}}{3^3}:r^a$

$\lim_{x\to-\infty}\left(-5x^5-8x\right)$