$2y-6x+9-3y-10$
$\lim_{x\to\infty}\left(6x^2-2x-4\right)$
$\sin\left(x\right)\cos\left(x\right)=\frac{1}{\tan\left(x\right)\cot\left(x\right)}$
$\int\frac{3x-2}{2x^2+4x-6}dx$
$121x^2-4$
$2\sin^2+\sin-1=0$
$4x^4-20x^3+15x^2+5x-4$
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