$\left(100-5t\right)\frac{dx}{dt}=2,5-20x$

$\sqrt[2]{3a^2b^3}\sqrt[2]{6a^5b^1}$

$100\cdot\:1634-9\left(23+56\right)$

$\left(6x-3y\right)+10-2\left[5x-9y-\left(8-6x\right)\right]$

$\frac{\left(\frac{1}{x+3}\right)-\left(\frac{1}{3}\right)}{x}$

$f\left(x\right)\:=\:ln\left(sin^2x\right)$

$8sinxcos^3x+8sin^3xcosx=4sin2x$