$15a^2b+20ab^2-5a^3b^4$

$\left(\left(\frac{45.33}{45.39}\right)-1\right)\cdot100$

$\frac{\left(-3pr^5+14p^4r^3-21pr\right)}{7pr^2}$

$\int2\cdot\cos^3\left(x\right)dx$

$\frac{\sec\left(x\right)}{\csc\left(x\right)\tan\left(x\right)}$

$\left(m+w\right)^3$

$\lim_{x\to\infty}\left(\frac{x^2\sin\left(x\right)}{x^3}\right)$