$9sin^2\left(a\right)+4sin^2\left(b\right)+12sin\left(a\right)sin\left(b\right)=16$

$\left(6m-\left|2\right|3n\right)\left(36m^2+4mn+\left|4\right|9n^2\right)$

$x\frac{dy}{dx}+\left(x+1\right)=e^x$

$\left(5x^4-3x^2+6x-3\right)+\left(-3x^4+x^3+5x^2-x+3\right)$

$\log\left(250\right)+\log\left(4\right)$

$\int\frac{1}{\left(x^2+6x+9\right)}dx$

$-1\cdot13+12$