$-\:20\:+\:1\:+\:15\:+\:\:-\:50\:+\:9\:$

$\left(9.7v+6.8w\right)\:+\:\left(4.8\:v-3.6w\right)$

$\int x\left(1-2x^2\right)^3dx$

$\lim_{x\to1}\left(\frac{9x-9}{\ln\left(x^8\right)}\right)$

$\sqrt{40t^7}$

$-567.0600-42.3300-77.8200-81.1500-119.5140$

$\cos\left(b+45^{\circ}\right)\sin\left(b+45^{\circ}\right)=\cos^2\left(b\right)-\frac{1}{2}$