$-\sin\left(a\right)-\sin\left(a\right)^2+\cos\left(a\right)^2=0$

$\frac{40abc^2}{10a^2b^2c^2}$

$3^2-3x+1$

$\left(\sqrt{5}\right)^0$

$\sqrt{\left(\frac{4m}{s}\right)^2+\left(\frac{2m}{s}\right)^2\left(2m\right)}$

$\lim_{x\to0}\left(xsin\left(\frac{2}{x}\right)\right)$

$\frac{-9}{2b^2}\cdot\frac{15}{-7b^5}$