$-2\cdot x=-400$
$\int\frac{2x+11}{\left(2x-1\right)\left(x+4\right)}dx$
$\left(z^5+7\right)^2$
$15x^4+15x^2$
$csc\left(4x+5\pi\right)=-\csc\left(4x\right)$
$-6x^2-4lx+2l^2$
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