$2^2+6^2-21+5$
$\int11x\cdot\sin\left(x\right)dx$
$3a-9ab+6ab$
$-3x+1>4$
$\frac{w}{3}=\:7$
$\frac{448}{8}$
$\lim_{x\to0}\frac{\sin\left(3x\right)\cos\left(4x\right)}{\cos\left(3x\right)\sin\left(4x\right)}$
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