$5\left(x-6\right)\left(x-2\right)^2+9$

$\frac{\cos\left(x\right)\left(1+\sin\left(x\right)\right)}{\sin\left(x\right)}$

$\left(2d-3\right)^3$

$-\frac{dy}{dx}=y\cdot x$

$15-7+6-1-9-6+19+8-3-1+4+5$

$\:\left(x+1\right)\:\left(x+2\right)\:+\:\left(x+2\right)\:\left(x+3\right)\:-2\:\:\left(x+5\right)\:\left(x-2\right)-x$

$2cos6x.sin2x-2sin6x.cos2x=-\sqrt{2}$