$\left(\cos\left(x\right)-sin\left(x\right)\right)^2+2\sin\left(x\right)\cos\left(x\right)=1$
$4x^2-x>1$
$\frac{2^2-x^2}{2+x}$
$\left(\frac{1}{2}x+4\right)^2=\frac{1}{4}x^2+x+1$
$\frac{x^4+2x^2-x^3+x+2}{x-2}$
$\int\left(5x-3\right)^7dx$
$24a^2-4a-140x^2$
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