$\left(4x^3+x^2-2x+100\right)-\left(4x^3+3x^2-2x+50\right)$
$\frac{x^{15}+y^{15}}{x^3+x^3}$
$\left(1+3x^2\right)\left(m+3x^2\right)$
$( 2 x - y ) ^ { 4 }$
$\int x^5\left(3x^2+2x-5\right)dx$
$2cos4x\:=\:1-2sin^22x$
$u^2-12u=43$
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