$\left(3x^2y\right)\left(5x^22\right)$

$\left(4x+3\right)\left(7x+1\right)$

$\frac{d^2}{dx^2}\left(2x-\sec\left(x\right)\right)$

$-10x^2-20x-16x+18x^2$

$\frac{16y^7-24y^5}{8y^2}$

$2-7\left[4-5-6\right]\left[5-7\cdot8-\left(3-2-5\right)+56-25\right]+34-45-\left(2-8\right)$

$\frac{dy}{dx}\left(\frac{\left(xsinx\right)}{lnx}\right)$