$7x^2+2x-3-5x+2$
$1+\frac{tan\left(x\right)}{\cot\left(x\right)}=\sec\left(x\right)$
$y+3-3$
$\sqrt[4]{16^3}$
$\left(1-x\right)\left(\sqrt{x}\right)$
$\left(-5\right).\left(+5\right)$
$8x^2+50x+63$
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