$4x^2y-7xy^2+x^2y+5xy^2+8xy-3y+8-7y-2xy+2y-x-1$
$a\:=\:110^{\circ},\:c\:=\:30^{\circ},\:c\:=\:3\:2$
$\left(2x^4y^5\right)^2\left(3x^2y^3\right)^4$
$\:x^2\:+\:2xy\:+\:y^2\:,\:para\:x\:=\:5,\:y\:=\:-2\:$
$4\sin^2\left(x+30\right)=1$
$2x^3-4x^4+2x^2$
$\frac{4x^2-24}{2x}$
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