$\left(6xy+2y^2-5\right)dx+\left(3x^2+4xy-6\right)dy$

$-10=3x-x^2$

$a+a+a-b-a+b$

$sin\left(\pi+x\right)-\sin\left(\pi-x\right)$

$\frac{\left(1+\frac{1}{sinx}\right)}{cosx+\frac{cosx}{sinx}}$

$\left(2xy-3x^2\right)dx+\left(x^2-2y\right)dy=0$

$\left(14ab-8a+24a^2\right)$