$2\left(y+2\right)\cdot x$

$\frac{cot\left(x\right)cos\left(x\right)}{tan\left(-x\right)sin\left(\frac{\pi}{2}-x\right)}$

$6d^6\cdot8d^4$

$3x^2+15x+3=-9$

$\:5\left(3x+4\right)$

$\csc^2\left(x\right)sin\left(3x\right)$

$\frac{dy}{dx}+y.\tan\left(x\right)=2x.\cos\left(x\right)$