$3 - 2 ( x - 1 ) \leq 2 ( 4 + x )$

$9x^2-42x+49=0$

$5\sin\left(x\right)^2+5\sin\left(x\right)=2$

$\frac{d}{dx}\left(7sinx+cosy=sinxcosy\right)$

$\left(1+y\right)\left(1-y+y^2\right)-y^3$

$\sqrt[3]{4m^3n^2}.6\sqrt[4]{8m^2}n$

$\lim_{x\to1}\left(\frac{x^2+7x-2}{x^2-3x+2}\right)$