$5m^2+15m^2$
$x^2+200x-9600=0$
$\sin^2\left(x\right)=\sin\left(x\right)+3$
$\frac{5}{-\infty}$
$-10^4$
$\frac{3}{4}^{-1-2}$
$cot\left(20\right)-\frac{sin\left(70\right)}{sin\left(20\right)}$
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