$2x^2-7x+3$

$\left(2y-5\right)\left(3y-1\right)$

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

$\left(\frac{cotx\:senx-cos^2x}{senx}\right)cscx$

$100m^2n^2-169y^2$

$\int4x^6dx$

$\frac{d^2}{dx^2}\left(3sen\left(x^2-1\right)\right)$