$4k^2+64k=-180$
$3a^4\cdot5a^3$
$\int_2^4\left(10+4x-3x^3\right)dx$
$\int4^{x+1}dx$
$y+x^2+2xy+2x^2$
$7x-49=0$
$2x^2-2x+4$
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