$\frac{d}{dp}\left(\frac{nrt}{p+\frac{a}{t}}\right)$

$\frac{2sin2x-sin2x}{1-cos2x}=\frac{sinx}{1+cosx}$

$\int_1^x\:\sqrt{t^25t}dt$

$\left(5x+1\right)\left(x-3\right)$

$\left(3x-1\right)\cdot\left(3x+1\right)-\left(x+8\right)^2$

$-\frac{10}{\sqrt[10]{\infty}}-\left(-\frac{10}{\sqrt[10]{1}}\right)$

$\left(3d-t\right)^3$