$2x^3+8x^2-5x+7-4x^2+16x$

$3\:sen\:x\:-\:cos2\:x\:-\:3\:=\:0$

$\frac{1}{2a}\sqrt{48a^3b^d}$

$64\:-\:x^3$

$\left(\frac{1}{1+\sin\left(a\right)}+\frac{1}{1-\sin\left(a\right)}\right)\cdot\cot\left(a\right)=\frac{2\sec\left(a\right)}{\sin\left(a\right)}$

$\left(\frac{\sqrt{2}\cdot x^{-2}}{\sqrt{16}\cdot x^3}\right)^{-2}$

$9e^{3x}-5\left(3e^{3x}\right)+6\left(e^{3x}\right)$