$\int\frac{7}{9x-2}dx$

$\infty-70$

$\frac{1}{3^{\infty}}$

$\left(2x^2y^0\right)\cdot2yx^2$

$\left(4m+5n+a^2\right)^2$

$\frac{\sin^4\left(x\right)}{\cos^2\left(x\right)}=\frac{\sin^2\left(x\right)}{\cos^2\left(x\right)}\sin^2\left(x\right)$

$12x^4y^2-48x^3y^3+24x^2y^4-60xy^5$