$-14x-8x$
$1+\cot\left(a\right)=\frac{\sin\left(a\right)+cos\left(a\right)}{\sin\left(a\right)}$
$2x^2-x^4+3x+6x^5-7x^3$
$3x-7<1$
$x^2-20x-76$
$9a-4b+2;\:a=-1;\:y$
$\left(4^{-2}\cdot8\right)^{-4}$
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