$a^2-6ab^2+9a-15a^2b-8a+5$

$\left(y^{\left(n+1\right)}-7\right)\left(y^{\left(n+1\:\right)}-8\right)$

$\frac{dy}{dx}=\frac{ye^{-3x}}{y^2e^{-y}+ycos\left(4y\right)}$

$\frac{96}{8}$

$\csc^{2}\theta\cdot\tan^{2}\theta-1=\tan^{2}\theta$

$\left(2n-3m\right)^4$

$27.35-96.77+67.41-65.63+13.73-54.62$