$y^{1-1}$

$\frac{cos\left(x-y\right)}{cos\left(x\right)\cdot\:\:sin\left(y\right)}=tan\left(x\right)+cot\left(y\right)$

$3x^2-10x$

$6y^2-19y+3$

$\int\left(4x^6\sqrt{9-4x^7}\right)\:dx$

$\left(2m^5n^3g^7\right)^3$

$\frac{7x^2}{9}+\frac{8x^7}{6}=\frac{y^9}{3}-\frac{1}{2}$