$\left(8x+8y-9\right)\left(9x-8\right)$

$6x+14=3x+29$

$3x+4-\log\left(49^{\frac{2x-3}{\log\left(7\right)}}\right)=0$

$\left(y-yx^2\right)\left(\frac{dy}{dx}\right)=\left(y+1\right)^2$

$-3x^2+7x+8$

$\sqrt{1-y^2}dx\:=\:\sqrt{1-x^2}dy$

$\cos\left(100\right)=\sin\left(120\right)$