$\frac{dy}{dx}=x^2y\:-y\:+\:x^2\:-\:1$

$\left(3x^2y^3+y^4\right)dx+\left(3x^3y^2+y^4+4xy^3\right)dy=0$

$1+\csc^2\cdot\cos^2$

$+2-2-7-4-8+2-13+14-12$

$3sin3x+sinx=10sinx\:-12sin^3x$

$4b\:2\:x\:4b\:2\:$

$\frac{\sin\left(7x\right)+sin\left(x\right)}{sin\left(4x\right)}=1$