Помогите с алгеброй 7 класс,дам много баллов

[latex] \frac{33b^{8}}{111a^{8}}: \frac{99b^{4}}{74a^{2}} : \frac{4b^{2}}{27a^{6}} = \frac{33b^{8}*74a^{2}*27a^{6}}{111a^{8}*99b^{4}*4b^{2}}= \frac{3b^{2}}{2} [/latex] [latex] \frac{52y^{6}}{84x^{10}}: \frac{39y^{3}}{102x^{2}}: \frac{34y^{2} }{45x^{9}} = \frac{52y^{6}*102x^{2}*45x^{9}}{84x^{10}*39y^{3}*34y^{2}}= \frac{3315xy}{1547} [/latex]