$3x\cdot y+3x\cdot3y$

$\left(4a^{2}b-2\right)^{3}$

$\frac{dy}{dx}=\frac{52}{x}-0.61\cdot y$

$-\left(x^3-4x^2+x-6\right)$

$\sec^2x+\csc^2x=\frac{\csc^2\left(x\right)}{\cos^2\left(x\right)}$

$\left(3ab\:+\:5\right)^{\circ}2$

$\left(\frac{1}{4}x^4\frac{5}{2}x^3+1\right)+\left(\frac{1}{7}x^2+\frac{3}{2}x-\frac{3}{4}\right)+\left(\frac{2}{3}x^4+3x^3-2x^2-\frac{1}{5}\right)$