$-16+49a^2$
$47-4x<7$
$-10x-24x^2+4$
$a^6\cdot a^4$
$\int\frac{x+4}{x^2+2x+13}dx$
$cos\:\left(90^{\circ}\:+\:x\right)$
$36x^4y^8-9a^2$
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