$10\:\frac{5}{6}x-1+9\:\frac{1}{6}-9$

$\frac{\sin\left(90+a\right)+\cos\left(180+a\right)\cdot\sin\left(-a\right)}{\sin\left(90\right)-\cos\left(90+a\right)}$

$\sqrt{\left(-1\right)}^7$

$\left(7w^{2}t^{3}+\frac{4}{3}w^{4}t^{5}\right)^{3}$

$x^2y+x^2z$

$\int_{-1}^1-12xdx$

$2x\cdot5x$