$x+18=35$

$-4x^2-49x-151=-7x^2-82x-235$

$\int_2^{senx}\sqrt{1-t^2}dt$

$\left(-3x^4y\right)\left(5x^5y^4-3x^4y^3z+4xz^4\right)$

$y^2=\frac{x^2-4}{x^2+4}$

$\frac{1+\cos\left(x\right)}{\sin\left(a\right)+\cos\left(x\right)\sin\left(x\right)}=\csc\left(x\right)$

$\left(ax^2-by^3\right)^2$