$3xy^2;\:x=2\::\:y=-1$

$\left(\frac{-m^6.n^{12}}{m^5.n^{11}}\right)^3$

$\int\left(5x^{3}-4x^{4}+x\right)\left(x^{2}+2x\right)dx$

$60-4+20-4-20-60-10+60$

$sin^2\left(x\right)+\frac{1}{sec^2\left(x\right)}+\frac{1}{tan^2\left(x\right)}=csc^2\left(x\right)$

$\frac{dy}{dx}=49y^2+81$

$\left(\frac{y^5}{y^2}\right)^2$